If the wavelength of one wave is 0.25 meters, how many waves will be formed on a rope that is one meter long?

Answers

Answer 1
Answer;

4 waves

Explanation;

Wavelength of one wave = 0.25 meters

Length of the rope = 1 meter

Therefore;

Number of waves = Length of the rope/wavelength of one wave

                              = 1/0.25

                              = 4 waves

Answer 2

Answer:

i wanan workkkkkk

Explanation:


Related Questions

As the waves tracel from the left through the barrier,they produce a pattern on the right side.In a segment of this pattern,part of the wave tends to disappear.What phenomenon of waves this this pattern to occur?

Answers

Final answer:

The pattern on the right side is caused by the interference of waves. When two or more waves come into contact, they can interact and produce a pattern due to constructive or destructive interference. In this case, the disappearing part of the wave is the result of destructive interference.

Explanation:

This phenomenon is known as interference. Interference occurs when two or more waves come into contact and interact with each other. In the case of the waves passing through the barrier, the interference results in a pattern on the right side where part of the wave tends to disappear. This pattern is caused by the superposition of the waves, where the peaks of one wave coincide with the troughs of another wave, leading to destructive interference and a reduction in the amplitude of the wave in certain regions.

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The sky looks blue during the day because the atmosphere scatters the light from the sun. The __________ rays are scattered more because they have shorter wavelengths.
Question options:
blue and violet
red, orange, and yellow
blue only
red only

Answer is blue and violet

Answers

The answer is blue and violet ask more answers if you need help with anything else and your welcome

Answer:

Blue and violet

Explanation:

This is the correct answer.

A 120 volt refrigerator uses 650 watts. Calculate how much work is done by the refrigerator in one hour.

A) 9.7 J
B) 39,000 J
C) 2,300,000 J
D) 4,100,000 J

Answers

1 Watt = 1 joule/second

650 watts = 650 joules/second

(650 J/sec) x (3,600 seconds/1 hour)  =  2,340,000 Joules/hour

Answer:

C) 2,300,000 J

Explanation:

A 120 volt refrigerator uses 650 watts. Calculate how much work is done by the refrigerator in one hour.

A) 9.7 J

B) 39,000 J

C) 2,300,000 J

D) 4,100,000 J

power is the rate at which work is done by a machine.

work done is the product of force and distance,

it is also when energy is expended by a machine

energy can be dissipated by the refrigerator in form of heat

power=650W

time=3600 secs

work done will be 650*3600

2340000.

approximately 2300000J

You see your friend 100 m away down the street. If you yell back and forth, your conversation will be affected by the speed of sound, which is 340 m/s. If, instead, you use your cell phone to call her on her cell phone, the conversation is relayed via a communications satellite that is 36000 km above you. What is the delay between a sound leaving your mouth and its arrival at your friend’s ear if (a) you yell, or (b) you use your cell phone? (c) How far would you have to be from your friend for the delays to be equal?

Answers

(a) 0.29 s

If you yell, your voice will reach your friend by travelling as a sound wave through the air.

The speed of sound in air is

v = 340 m/s

while the distance to be covered is

d = 100 m

So, the time taken is

[tex]t=\frac{d}{v}=\frac{100 m}{340 m/s}=0.29 s[/tex]

(b) 0.24 s

In this case, the voice is transmitted as a radio wave (electromagnetic wave) to the satellite and then back.

The speed of electromagnetic waves is the speed of light:

[tex]c=3\cdot 10^8 m/s[/tex]

while the distance the wave has to cover is twice the distance between the ground and the satellite:

[tex]d=2 \cdot 36000 km=72000 km=7.2 \cdot 10^7 m[/tex]

So, the time taken is

[tex]t=\frac{d}{c}=\frac{7.2\cdot 10^7 m}{3\cdot 10^8 m/s}=0.24 s[/tex]

(c) 81.6 m

In order for the two delays to be equal, the distance between you and your friend (d') must satisfy the equation

[tex]\frac{d'}{v}=\frac{d}{c}[/tex]

where on the left is the time taken by the sound to travel through the air, while on the right is the time taken by the radio wave to travel back and forth from the satellite.

Solving the equation for d',

[tex]d'=v\frac{d}{c}=(340 m/s)\frac{7.2\cdot 10^7 m}{3\cdot 10^8 m/s}=81.6 m[/tex]

. List five endothermic reactions that are going on around you.

Answers

Final answer:

Endothermic reactions are chemical processes that absorb heat. Examples are photosynthesis, melting ice, sweating, baking bread, and the use of cold pack for injuries.

Explanation:

Endothermic reactions are chemical processes that absorb heat from the surroundings, the opposite of exothermic reactions which release heat. Here are five examples of endothermic reactions that may occur around you:

Photosynthesis: In plants, sunlight is absorbed and used to convert carbon dioxide and water into glucose and oxygen.Ice melting: When ice melts, it absorbs heat from the surroundings and transforms from a solid into a liquid.Sweating: When the sweat on your skin evaporates, it absorbs heat from your body, helping to cool you down.Baking bread: The process of baking involves the absorption of heat, causing the dough to rise.Use of a cold pack for injuries: By mixing water and ammonium nitrate, the resulting process absorbs heat and cools down the injury.

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Electrons in an atom make up most of the _________ of the atom, while the protons and neutrons make up nearly all of the __________ of the atom.

Answers

Answer:

volume;mass

Explanation:

Answer:

Electrons in an atom make up most of the volume of the atom, while the protons and neutrons make up nearly all of the mass of the atom.

Explanation:

Most of the mass of an atom comes from its nucleus, in which protons and neutrons are found, both of these particles have approximately the same mass.

The atom is also composed of electrons rotating in orbitals around the nucleus, and they have little mass compared to a proton or neutron. But despite being much lighter than the particles in the nucleus, the electron cloud occupies most of the space or volume of the atom.

You would like a pendulum that swings back and forth once every 2 seconds, but the one you have swings once every 1.9 seconds. Which of the following should you do to adjust it so that it has the desired period?Remove some mass from the pendulum.Make the pendulum slightly shorter.Add more mass to the pendulum.Make the pendulum slightly longer.

Answers

Your pendulum does a complete swing in 1.9 seconds.  You want to SLOW IT DOWN so it takes 2.0 seconds.

Longer pendulums swing slower.

You need to make your pendulum slightly longer.

If your pendulum is hanging by a thread or a thin string, then its speed doesn't depend at all on the weight at the bottom.  You can add weight or cut some off, and it won't change the speed a bit.  

Final answer:

To make a pendulum swing with a period of 2 seconds instead of 1.9 seconds, the length of the pendulum should be increased.

Explanation:

The subject of this question is Physics, specifically concerning mechanics and the operation of a simple pendulum. To achieve the desired period of 2 seconds per swing for your pendulum, which currently swings once every 1.9 seconds, you should make the pendulum slightly longer. The period of a simple pendulum is determined by the formula T = 2π√(L/g), where T is the period, L is the length, and g is the acceleration due to gravity. Since the period is proportional to the square root of the length, and you wish to increase the period, you should increase L, meaning the length of the pendulum must be extended. Adding mass, removing mass, or shortening the length of the pendulum would not give you the desired period.

A charge of 100 elementary charges is equivalent to (1) 1.60 times 10^-21 C (2) 1.60 times 10^-17 C (3) 6.25 times 10^16 C (4) 6.25 times 10^20 C

Answers

Answer:

(2) 1.60 times 10^-17 C

Explanation:

The value of one elementary charge is

[tex]1 e = 1.60\cdot 10^{-19} C[/tex]

In this problem, we have 100 elementary charges: to find how many Coulombs it corresponds, we have to set up the following proportion

[tex]1 e: 1.60\cdot 10^{-19}C= 100 e : x[/tex]

And solving for x, we find

[tex]x=\frac{(1.6\cdot 10^{-19}C)(100 e)}{1 e}=1.6\cdot 10^{-17}C[/tex]

So, the correct answer is

(2) 1.60 times 10^-17 C

As the kinetic energy of an object increases, so does the _________ energy produced. A) heat B) light C) atomic D) potential

Answers

Answer:

A) heat

Explanation:

As kinetic energy increases, so does the heat energy produced. The faster the molecules move, the more heat that is generated.

As the kinetic energy of an object increases, so does the heat energy, light energy, atomic energy or potential energy may be produced.

What is law of conservation of energy?

Energy cannot be created or destroyed, according to the rule of conservation of energy. However, it is capable of change from one form to another. An isolated system's total energy is constant regardless of the types of energy present. The law of energy conservation is adhered to by all energy forms. The law of conservation of energy essentially says that

The total energy of the system is conserved in a closed system, also known as an isolated system.

Example of change of kinetic energy to heat energy: rubbing your hands together.

Example of change of kinetic energy to light energy: Scratching two stones with each other.

Example of change of kinetic energy to atomic energy: Fission in nuclear reactor.

Example of change of kinetic energy to potential energy: Blowing of balloon.

Hence, all options are correct.

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Force exerted by a person or object is called

Answers

Force exerted by a person or thing is called _____ force. applied. A change in the speed or direction of an object is called. acceleration. Force is a vector.

A cave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. The lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 2.40 m/s; (b) he is then lifted at the constant speed of 2.40 m/s; (c) finally he is decelerated to zero speed. How much work is done on the 84.0 kg rescue by the force lifting him during each stage?

Answers

(a) 9305 J

Let's start by finding the acceleration of the spelunker, through the following equation:

[tex]v^2-u^2=2ad[/tex]

where

v = 2.40 m/s is the final velocity

u = 0 is the initial velocity

a is the acceleration

d = 11.0 m is the distance covered

Solving for a,

[tex]a=\frac{v^2-u^2}{2d}=\frac{(2.40 m/s)^2-0}{2(11.0 m)}=0.26 m/s^2[/tex]

Now we can find the force lifting the spelunker. The equation for Newton's second law applied to the spelunker is:

[tex]F-mg = ma[/tex]

where

F is the lifting force

m = 84.0 kg is the mass of the spelunker

g = 9.81 m/s^2 is the acceleration due to gravity

a = 0.26 m/s^2 is the acceleration

Solving for F,

[tex]F=m(a+g)=(84.0 kg)(0.26 m/s^2+9.81 m/s^2)=845.9 N[/tex]

And now we can finally find the work done on the spelunker by the lifting force F:

[tex]W=Fd=(845.9 N)(11.0 m)=9305 J[/tex]

(b) 9064 J

In this case, the speed is constant, so the acceleration is zero. So Newton's second Law becomes

[tex]F-mg=0[/tex]

From which we find

[tex]F=mg=(84.0 kg)(9.81 m/s^2)=824.0 N[/tex]

And so the work done is

[tex]W=Fd=(824.0 N)(11.0 m)=9064 J[/tex]

(c) 8824 J

The acceleration of the spelunker here is given by

[tex]v^2-u^2=2ad[/tex]

where

v = 0 is the final velocity

u = 2.40 m/s is the initial velocity

a is the acceleration

d = 11.0 m is the distance covered

Solving for a,

[tex]a=\frac{v^2-u^2}{2d}=\frac{0-(2.40 m/s)^2}{2(11.0 m)}=-0.26 m/s^2[/tex]

Newton's second law applied to the spelunker is:

[tex]F-mg = ma[/tex]

where

F is the lifting force

m = 84.0 kg is the mass of the spelunker

g = 9.81 m/s^2 is the acceleration due to gravity

a = -0.26 m/s^2 is the acceleration

Solving for F,

[tex]F=m(a+g)=(84.0 kg)(-0.26 m/s^2+9.81 m/s^2)=802.2 N[/tex]

And now we can finally find the work done on the spelunker by the lifting force F:

[tex]W=Fd=(802.2 N)(11.0 m)=8824 J[/tex]

An automobile whose speed is increasing at a rate of 0.800 m/s2 travels along a circular road of radius 10.0 m.

(a) When the instantaneous speed of the automobile is 3.00 m/s, find the tangential acceleration component.

(b) What is the centripetal acceleration component?

(c) Determine the magnitude and direction of the total acceleration.

Answers

(a) [tex]a_t = 0.800 m/s^2[/tex]

The tangential acceleration component of the car is simply equal to the change of the tangential speed divided by the time taken:

[tex]a_t = \frac{\Delta v}{\Delta t}[/tex]

This rate of change is already given by the problem, 0.800 m/s^2, so the tangential acceleration of the car is

[tex]a_t = 0.800 m/s^2[/tex]

(b) [tex]a_c = 0.9 m/s^2[/tex]

The centripetal acceleration component is given by

[tex]a_c = \frac{v^2}{r}[/tex]

where

v is the tangential speed

r is the radius of the trajectory

When the speed is v = 3.00 m/s, the centripetal acceleration is (the radius is r = 10.0 m):

[tex]a_c = \frac{(3.00 m/s)^2}{10.0 m}=0.9 m/s^2[/tex]

(c) [tex]1.2 m/s^2, 48.4^{\circ}[/tex]

The centripetal acceleration and the tangential acceleration are perpendicular to each other, so the magnitude of the total acceleration can be found by using Pythagorean's theorem:

[tex]a=\sqrt{a_t^2+a_c^2}=\sqrt{(0.8 m/s^2)^2+(0.9 m/s^2)^2}=1.2 m/s^2[/tex]

and the direction is given by:

[tex]tan \theta =\frac{a_c}{a_t}=\frac{0.9 m/s^2}{0.8 m/s^2}=1.125\\\theta=tan^{-1}(1.125)=48.4^{\circ}[/tex]

where the angle is measured with respect to the direction of the tangential acceleration.

Final answer:

The tangential acceleration component at 3.00 m/s is 0.800 m/s². The centripetal acceleration component is calculated to be 0.900 m/s². The magnitude of the total acceleration is approximately 1.20 m/s² and is found using the vector sum of the tangential and centripetal components.

Explanation:

Understanding Circular Motion and Acceleration

An automobile that is increasing its speed while traveling along a circular path experiences two components of acceleration: tangential acceleration and centripetal acceleration. Given a tangential acceleration of 0.800 m/s² and an instantaneous speed of 3.00 m/s, we can directly state that the tangential acceleration component is 0.800 m/s² as it defines how quickly the vehicle is speeding up along the path.

To find the centripetal acceleration component, we use the formula ac = v² / r, where v is the velocity and r is the radius. Plugging in the values, we calculate ac = (3.00 m/s)² / (10.0 m) = 0.900 m/s².

Finally, the magnitude of the total acceleration can be found by combining these two perpendicular components using the Pythagorean theorem: atotal = √(at² + ac²). Thus, atotal = √(0.8002 + 0.9002) which calculates to approximately 1.20 m/s². The direction of the total acceleration is the direction of the vector sum of the tangential and centripetal accelerations.

An ice cube of mass 50.0 g can slide without friction up and down a 25.0 degree slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 0.100 m . The spring constant is 25.0 N/m . When the ice cube is released, how far will it travel up the slope before reversing direction?Identify the initial and final gravitational potential energies.Enter your answers, separated by a comma, in terms of some or all of the variables m, k, x, d, θ, and the acceleration due to gravity, g.Identify the initial and final elastic potential energies.Enter your answers, separated by a comma, in terms of some or all of the variables m, k, x, d, θ, and the acceleration due to gravity, g.

Answers

Final answer:

The initial gravitational potential energy of the ice cube is zero, and the final gravitational potential energy is mgxsin(θ). The initial elastic potential energy of the spring is 0.125 J, and the final elastic potential energy is zero.

Explanation:

First, let's calculate the initial gravitational potential energy of the ice cube. The potential energy is given by the formula PE = mgh, where m is the mass, g is the acceleration due to gravity, and h is the height. Since the ice cube is at the bottom of the slope, the height h is zero. Therefore, the initial gravitational potential energy is 0.

Next, let's calculate the final gravitational potential energy of the ice cube. When the ice cube reaches the maximum height before reversing direction, its height h is given by h = d * sin(θ), where d is the distance traveled up the slope and θ is the angle of the slope. Plugging in the values, we get h = x * sin(θ). Therefore, the final gravitational potential energy is mgh = mgxsin(θ).

The initial elastic potential energy of the spring is given by the formula PE = 0.5kx^2, where k is the spring constant and x is the compression distance. Plugging in the values, we get PE = 0.5 * 25.0 * (0.100)^2 = 0.125 J. The final elastic potential energy is zero because the spring is fully extended when the ice cube reaches the maximum height.

A projectile is launched with a momentum of 200 kg •m/s and 1000 j of kinetic energy. What is the mass of the projectile?

Answers

Answer:

0.1 kg

Explanation:

The kinetic energy of an object is given by:

[tex]K=\frac{1}{2}mv^2[/tex]

where

m is the mass of the object

v is the speed of the object

The momentum of an object is given by

[tex]p=mv[/tex]

which is the product of mass and speed.

We can combine the two equations to get an expression that relates the kinetic energy K to the momentum p:

[tex]K=\frac{1}{2}m(\frac{p}{m})^2=\frac{p^2}{2m}[/tex]

In this problem, we know

[tex]K=1000 J[/tex] is the kinetic energy

[tex]p=200 kg m/s[/tex]

So we can solve the formula for m to find the mass of the projectile:

[tex]m=\frac{p^2}{2K}=\frac{(200 kg m/s)^2}{2(1000 J)}=20 kg[/tex]

The mass of the projectile object that has a kinetic energy of 1000 J and momentum of 200 kgm/s is 20 kg.

What is kinetic energy?

When a body of mass (m) and moving with the velocity (u) then the body possesses the energy and this energy is called kinetic energy.

A projectile is launched with a momentum of 200 kg m/s and 1000 J of kinetic energy.

We know that the equation of kinetic energy is given by

[tex]\rm KE = \dfrac{1}{2} mu^2[/tex]...1

We know the momentum is given by

[tex]\rm P = mu\\\\u = \dfrac{p}{m}[/tex]..2

From equations 1 and 2, we have

[tex]\rm KE = \dfrac{1}{2} m(\dfrac{P}{m})^2\\\\KE = \dfrac{1}{2m} (P)^2\\\\m \ \ = \dfrac{P^2}{2*KE}[/tex]

Put the value of kinetic energy (KE) and momentum (P), we have

[tex]\rm m = \dfrac{P^2}{2*KE}\\\\\\m = \dfrac{200^2}{2*1000}\\\\\\m = \dfrac{40000}{2000}\\\\\\m = 20[/tex]

The mass of the projectile object is 20 kg.

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Black holes are highly condensed remnants of stars. Some black holes, together with a normal star, form binary systems. In such systems the black hole and the normal star orbit about the center of mass of the system. One way black holes can be detected from Earth is by observing the frictional heating of the atmospheric gases from the normal star that fall into the black hole. These gases can reach temperatures greater than 1.10 106 K. Assuming that the falling gas can be modeled as a blackbody radiator, estimate λmax for use in an astronomical detection of a black hole. (Remark: This is in the X-ray region of the electromagnetic spectrum.)

Answers

[tex]\lambda_\text{max} = 2.63\times 10^{-9}\;\text{m}[/tex].

Explanation

The peak emission wavelength of an object depends on its absolute temperature.

[tex]\lambda_\text{max} = \dfrac{2.90\times 10^{-3}}{T}[/tex],

where

[tex]\lambda_\text{max}[/tex] is the wavelength in meters where the emission is the strongest.[tex]T[/tex] is the temperature of the object in degrees Kelvins.

For the gas falling into the black hole,

[tex]T = 1.10\times 10^{6}\;\text{K}[/tex].

Apply the formula:

[tex]\lambda_\text{max} = \dfrac{2.90\times 10^{-3}}{T} = \dfrac{2.90\times 10^{-3}}{1.10\times 10^{6}} = 2.64\times 10^{-9}\;\text{m} = 2.64 \;\text{nm}[/tex].

The question mentioned that [tex]\lambda_\text{max}[/tex] is in the X-ray region of the electromagnetic spectrum. According to Encyclopedia Britannica, the wavelength of X-rays range from [tex]10^{-8}\;\text{m}=10\;\text{nm}[/tex] to [tex]10^{-10}\;\text{m} = 0.1\;\text{nm}[/tex], which indeed includes [tex]2.64\times 10^{-9}\;\text{m} = 2.64 \;\text{nm}[/tex].

Methods of heat transfer worksheet
Define conduction:
Define convection:
Define radiation:

Answers

Conduction: conduction is the transfer of heat due to direct contact between two mediums, or between two parts of the same medium at different temperature. In conduction, the particles of the hotter medium vibrate faster than the particles of the colder medium, so the particles of the first medium transfer kinetic energy (by means of collisions) to the particles of the second medium, until when the two mediums reach the same temperature.

Convection: convection is the transfer of heat due to movement of masses of molecules in fluid. Convection occurs when a fluid is heated by an external source: the region of the fluid closer to the source gets warmer, so it expands and becomes less dense; as a consequence, it rises while the colder, denser regions of the fluid sink towards the source of heat. The process then continues forming the so-called "convective current", until the source of heat is turned off.

Radiation: radiation is the transfer of heat through electromagnetic radiation. Electromagnetic waves consist of oscillating electric and magnetic fields, which carry energy through space. Every object emits electromagnetic radiation, so every object transfer heat by radiation. This is the only method of heat transfer that does not require a medium to occur, since electromagnetic radiation can travel in vacuuum also.

Answer:  Conduction: This is a flow of heat by direct contact. Heat travels from a warmer object toward a colder object.

Radiation: Radiation is the transfer of energy by electromagnetic radiation. Radiation does not require a medium in which the energy needs to transmit through. Solar radiation warming the Earth’s surface is an example. The radiation transfers from the sun through space and then strikes the Earth. All objects emit radiation. Colder objects emit longer wavelength radiation while warmer objects emit shorter wavelength radiation.  

Convection: This is a transfer of heat by mixing a fluid. Convection occurs within liquids and gases. Examples include boiling water and when warm water mixes with cold water. In meteorology, convection is a common heat transfer mechanisms in the troposphere.

Explanation:

Astronauts on the first trip to Mars take along a pendulumthat has a period on earth of 1.50 s. The period on Mars turns out to be 2.45 s.What is the free-fall acceleration onMars?

Answers

Answer:

3.68 m/s^2

Explanation:

The period of a pendulum is:

[tex]T=2 \pi \sqrt{\frac{L}{g}}[/tex]

where L is the length of the pendulum and g is the gravitational acceleration.

On Earth, T = 1.50 s and g = 9.8 m/s^2, so we can solve the formula for L to find the length of the pendulum:

[tex]L=g(\frac{T}{2 \pi})^2=(9.8 m/s^2)(\frac{1.50 s}{2\pi})^2=0.56 m[/tex]

The length of the pendulum remains the same on Mars, and since on Mars the period of the pendulum is T = 2.45 s, we can now solve the equation again for g, the gravitational acceleration on Mars:

[tex]g=(\frac{2\pi}{T})^2 L=(\frac{2\pi}{2.45 s})^2 (0.56 m)=3.68 m/s^2[/tex]

The free-fall acceleration on the Mars is 3.68 m/s².

Equivalent length of the  pendulum

The length of the pendulum on mars is calculated as follows;

[tex]T = 2\pi \sqrt{\frac{L}{g} } \\\\L = \frac{T^2 g}{4\pi^2} \\\\L = \frac{(1.5)^2 \times 9.8}{4\pi ^2} \\\\L = 0.56 \ m[/tex]

Free- fall acceleration

The free-fall acceleration on the Mars is calculated as follows;

[tex]g = \frac{L4\pi ^2}{T^2} \\\\g = \frac{0.56 \times 4\pi ^2}{(2.45)^2} \\\\g = 3.68 \ m/s^2[/tex]

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According to the graph above, how large of a force is needed in order to stretch the string 1.00 meters?
100 N
120 N
400 N
420 N

Answers

My guess for this one would be; 400 N

My reasoning would be; it starts at 0 on both X and Y, if you need to get to 1.00 meters thats 4/4. 1/4 of 1.00 is .25, and on .25 its on 100 so multiply it by 4 to make 1.00 and you get 400 N

Answer:

The needed force is 400 N.

Explanation:

We need to calculate the force for 1.00 m string

According to graph,

The force applied for stretch from 0.10 to 0.15 is 20 N.

0.10-0.15 = 0.05 m

So, the force applied is 20 N for 0.05 m.

For stretch 0.05 m = 20 N

For stretch 1 m = [tex]\dfrac{20}{0.05}= 400\ N[/tex]

Hence, The needed force is 400 N.

ANSWER TRUE OR FALSE: longer days in the summer help to make summer warmer

Answers

I'm pretty sure the answer is false.

Why do astronomers think that the milky way is a spiral galaxy?

Answers

1) When you look toward the Galactic Center with your eye, you see a long, thin strip. This suggests a disk seen edge-on, rather than a ellipsoid or another shape. We can also detect the bulge at the center. Since we see spiral galaxies which are disks with central bulges, this is a bit of a top.

Final answer:

Astronomers believe the Milky Way is a spiral galaxy because its rotational motion, gas, color, and dust are characteristics of spiral galaxies, and it matches the observable structures of other known spiral galaxies. Our position within one of its spiral arms helps us observe these features. The differential rotation of the Milky Way creates and maintains the spiral arm structure over time.

Explanation:

Astronomers conclude that the Milky Way is a spiral galaxy for multiple reasons. The observable band of light from Earth, known as the Milky Way, is the disk of our galaxy which exhibits the characteristics of a typical spiral galaxy. When observing the velocity of stars and gas, we see rotational motion typical of spiral galaxies. Moreover, the presence of gas, distinctive colors, and dust within our galaxy align with those found in other known spiral galaxies.

Our Solar System is situated within one of these spiral arms, giving us a vantage point from which we observe most of the stars. To better understand the structure of the Milky Way, astronomers compare it to visible spiral galaxies, such as the Andromeda galaxy. These comparisons have been invaluable for grasping the Milky Way's properties.

One of the Milky Way’s defining features is its differential rotation, which causes its material to stretch into the distinct spiral arms we theorize it has. Despite this differential rotation, which one might expect would wind the arms tighter over billions of years, the arms maintain their spiral structure, suggesting that there are additional dynamics at play to keep them from winding up too tightly.

Before starting the simulation and having the waves encounter the barrier, the wavelength is manipulated. This is the (1. BLANK) variable.




The pattern of diffraction will vary as a result of the change in wavelength. The diffraction angle is therefore the (2. BLANK) variable.




A “constant” is a parameter that stays the same regardless of the variables. The parameter of the barrier that is held constant is the (3. BLANK).

Answers

1.) independent

2.) dependent

3.) gap width

Answer:

1. Independent

2. Dependent

3. width of barrier line

Explanation:

1. The independent variable is the one that does not depend on any variable and it can be set to any value. Thus, wavelength is Independent variable.

2. The dependent variable is the one which depends upon the value of other variables, like diffraction angle here depends upon the wavelength. Thus, diffraction angle is Dependent variable.

3. The parameter kept constant of the barrier is the width of barrier line. Multiple lines are drawn on diffraction grating to provide obstruction to wave. Their width is always kept constant.

uring spring semester at MIT, residents of the parallel buildings of the East Campus dorms battle one another with large catapults that are made with surgical hose mounted on a window frame. A balloon filled with dyed water is placed in a pouch attached to the hose, which is then stretched through the width of the room. Assume that the stretching of the hose obeys Hooke's law with a spring constant of 130 N/m. If the hose is stretched by 5.50 m and then released, how much work does the force from the hose do on the balloon in the pouch by the time the hose reaches its relaxed length?

Answers

Answer:

1966 J

Explanation:

The work done by the hose on the balloon is equal to the elastic potential energy stored in it:

[tex]W=U=\frac{1}{2}kx^2[/tex]

where

k = 130 N/m is the spring constant

x = 5.50 m is the stretching of the hose before it is being released

If we substitute these numbers into the equation, we find:

[tex]W=U=\frac{1}{2}(130 N/m)(5.50 m)^2=1966 J[/tex]

So, the work done is 1966 J.

Pls help! Urgent and giving brainliest!


Arrange the letters to show the path of the light ray as it travels from the object to the viewers eye.


A B C D E

Answers

Answer:

DCEBA

Explanation:

The principal advantage of sending electric power across country on very high voltage transmission lines is that

Answers

Answer:

The principal advantage of sending electric power across country on very high voltage transmission lines is that it minimizes the power loss due to resistance in conductors.

Explanation:

To answer this question, we must keep in mind the relationship between power, current and resistance, that can be written as:

[tex]P=I^2R[/tex]

So power is dissipated as heat. From the equation, the power loss in the transmission line is proportional to [tex]I^2[/tex]. Another relationship we need to talk about is between power, current and voltage:

[tex]P=VI[/tex]

As you can see, current is inversely proportional to voltage, so if you increase the voltage, then the current decrease and the power loss also decreases.

What is the purpose of the trial titration

Answers

The purpose of this titration is to give you a rough idea how much titrant is needed before you begin the actual titration.

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Answer:The purpose of this titration is to give you a rough idea how much titrant is needed before you begin the actual titration. Use a pipet to deliver a known amount of the analyte to the appropriate container (usually an Erlenmeyer flask) which has been cleaned and rinsed with distilled water.

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50 POINTS! If the moon were twice as massive but twice as far from Earth, high tides on Earth would be – (think of it’s force)
a. higher
b. lower
c. no different

Answers

The answer would be C. If its twice as massive, AND twice as far, nothing would really change.

If the moon were twice as massive but twice as far from Earth, high tides on Earth would be lower.

Answer: Option B

Explanation:

The occurrence of high tides on Earth is due to the gravitational force of moon acting on the sea water. So the gravitational force of moon during full moon day will be maximum as the distance between Earth and Moon will be minimum during this time and thus the moon’s gravity will be pulling the sea water towards itself leading to the formation of high tides.

As the high tides are formed due to the gravitational force acting between moon and Earth, the mathematical representation will be  

                [tex]F=\frac{G M_{\text {moon }} M_{\text {Earth}}}{d^{2}}[/tex]

Let the F be the normal gravitational force acting between moon and Earth with [tex]M_{\text {moon }}[/tex] and [tex]M_{\text {earth }}[/tex] as the mass of moon and Earth, respectively and d be the distance of separation of moon from Earth.

Now if we consider the special case given here where the mass of moon is doubled and also the distance of separation of moon from the earth is also doubled. So the new gravitational force with the parameters and comparing we get

        [tex]F^{\prime}=\frac{G M_{\text {moon }}^{\prime} M_{\text {earth }}}{d^{\prime 2}}[/tex]

        [tex]F^{\prime}=\frac{2 \times G \times M_{\text {moon}} \times M_{\text {earth}}}{4 d^{2}}[/tex]

         [tex]F^{\prime}=\frac{1}{2} F[/tex]

So as the gravitational force between Earth and moon will be reduced to half on doubling the distance of separation as well as mass of the moon, the occurrence of high tides will be lower with the given conditions.

What happens to the particles of a substance as its temperature increases?

Answer :They move faster

Answers

They move faster and depending on the substance they evaporate or start to melt and release the liquid within.

Answer:

they move faster

Explanation:

Select the sentences about the physical nature of light that are true. Check all that apply. Check all that apply. Blue light has a wavelength of 750 nm, the longest wavelength of visible light, and red has a wavelength of 500 nm. Light is electromagnetic radiation, a type of energy embodied in oscillating electric and magnetic fields. The units of frequency are distance per second. The more closely spaced the waves, that is, the longer the wavelength, the more energy there is. Grass appears green because it reflects primarily the wavelength associated with green light and absorbs the others. Light in a vacuum travels at 3.00×108mph. Electromagnetic radiation can be characterized by wavelength, amplitude, and frequency. The presence of a variety of wavelengths in white light is responsible for the way we perceive colors in objects.

Answers

Correct options:

- Blue light has a wavelength of 750 nm, the longest wavelength of visible light, and red has a wavelength of 500 nm. --> FALSE. It's actually the opposite: blue light has a wavelength of approx. 500 nm, while red has a wavelength of 750 nm, the longest wavelength of visible light.

- Light is electromagnetic radiation, a type of energy embodied in oscillating electric and magnetic fields. --> TRUE. Electromagntic radiation is a type of transverse waves, consisting of electric and magnetic fields oscillating perpendicularly to each other.

- The units of frequency are distance per second. --> FALSE. Frequency is measured in Hertz (Hz), which corresponds to 1/seconds ([tex]s^{-1}[/tex].

- The more closely spaced the waves, that is, the longer the wavelength, the more energy there is. --> FALSE. The energy of an electromagnetic wave is inversely proportional to the wavelength:

[tex]E=\frac{hc}{\lambda}[/tex]

that means, the longer the wavelength, the less energy there is.

- Grass appears green because it reflects primarily the wavelength associated with green light and absorbs the others. --> TRUE. The color of the objects as we see them corresponds to the color they reflect, while all the other colors are absorbed by the object.

- Light in a vacuum travels at 3.00×108mph. --> FALSE. The units are wrong: the speed of light in a vacuum is [tex]3.00\cdot 10^8 m/s[/tex].

- Electromagnetic radiation can be characterized by wavelength, amplitude, and frequency. --> TRUE. Wavelength is the distance between two consecutive crests, amplitude is the maximum displacement of the wave relative to the equilibrium position, frequency is the number of oscillations per second.

- The presence of a variety of wavelengths in white light is responsible for the way we perceive colors in objects. --> TRUE. White light consists of many different colors, and depending on which of them are absorbed/reflected by the objects, we perceive them in different ways.

Answer: the question is what are the colors of visible light.

Explanation: red, orange, yellow, green, blue, indigo, and violet.

Whose famous conjecture is paraphrased as "space, time, and matter"?

Answers

The person who came up with this conjecture was Albert Einstein

Answer:

John Archibald Wheeler

Explanation:

the famous conjecture  "space, time, and matter" is given by John Archibald Wheeler .

Albert Einstein stated that the fourth dimension is space time.

But  John Archibald Wheeler  was the physicist who later collaborator of Albert Einstein and work on the mission to achieve unified field theory.

John Archibald Wheeler stated that space time tells matter how to move and matter curves space time.

smog is a homogeneous mixture heterogeneous mixture​

Answers

Heterogenous mixture. Meaning it is a mixture of many different things in the air, other than just one thing (homogenous).

Smog is a heterogeneous mixture.

Explanation:

The mixtures are classified into two type depending upon their uniformity. When the mixture is uniformly distributed, it is called as a homogeneous mixture and when the mixture is spread in a uneven manner, it is called as an heterogeneous mixture. Smog is a chemical reaction which occurs when rays of light reacts with nitrogenous oxides. It is also a type of air pollution.

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