D. 5ft
Explanation:
The wave base of a wave is the depth at which there is no more perturbation of the medium caused by the wave. The wave base of a wave is determined to be half the wavelength of the wave itself.
In this problem, we have a wave with wavelength of 10 ft, so the wave base is
[tex]b=\frac{\lambda}{2}=\frac{10 ft}{2}=5 ft[/tex]
When experimenting, you purposely change the temperature, temperature is the ___ variable?
Protons
Neutrons
Which statement is accurate for these two sub-atomic particles.
A) They both have a neutral charge.
B) They both have a positive charge.
C) They are both located in the nucleus.
Eliminate
D) They are both located outside the nucleus.
Answer:
c
Explanation:
What are you calculating when you measure the disorder of a system?
A)enthalpy
B)efficiency
C)entropy
D)energy equilibrium
Answer:
C) Entropy
Explanation:
Entropy is defined as the quantitative disorder or randomness in the system. This concept is coming out of the system of thermodynamics which deals with the transfer of heat in the system.
There are some key features of entropy which are discussed below:
To decrease the entropy there must be supply of heat from the outside of the system.Entropy is defined as the measure of probability and the disturbance of molecules in the macroscopic system.Therefore, entropy is the measure of the disorder of a system.
TRUE OR FALSE!? HELP!!!!!
a) During deposition, particles of molecular nitrogen become farther apart.
b) When a piece of copper melts, its particles remain the same.
(Please, explain your answer!!!!)
Answer:
False
True
Explanation:
False: The reason is because theyare bonded by molecules
True: This is because a physical change does not change the chemical composition
Helium is considered a noble gas because it has a _blank___ valence electron shell
Answer:
Helium has a full valency electron shell
Explanation:
Noble gases are gases at in general they don't react with any other element easily. They are a group of elements that make up Group 18 on the periodic table. They are referred to as inert gases because of their unreactive nature because they have a full valency electron shell. They have the following general properties: colourless, odourless, tasteless, and are nonflammable gases.
The distance between Earth and the Moon is about 384,400 kilometers. The distance can be written in scientific notation as a × 10b kilometers, where a = and b = .
Answer:
[tex]3.844 \cdot 10^5 km[/tex], where a = 3.844 and b=5.
Explanation:
A number can be written in scientific notation as follows:
[tex]a \cdot 10^b[/tex]
where it means that the number 'a' is multiplied by 10 to the power b.
Practically speaking, it means that in order to write a number in scientific notation, we must move the dot to the left by 'b' positions. In this problem, we have the following number:
384400 km
Therefore, we have to move the dot to the left by 5 position, so we get:
[tex]3.84400 \cdot 10^5 km[/tex]
and we can get rid of the '00' since they are meaningless:
[tex]3.844 \cdot 10^5 km[/tex]
A 2 kg bar of metal weighs about 4.4 pounds. Approximately how much does it weigh in newtons?
A) 1 N
B) 44 N
C) 2.2 N
D) 20 N
Answer:
Answer is D) 20 N
Explanation:
A 2 kg bar of metal weighs approximately 19.58 newtons. This gives us an approximate weight of 19.58 newtons, which is closest to option D) 20 N.
Explanation:To convert the weight of a metal bar from pounds to newtons, you can use the conversion factor: 1 pound is approximately equal to 4.44822 newtons.
To convert the weight of the metal bar from pounds to newtons, we can use the conversion factor 1 pound = 4.45 newtons. Therefore, to find the weight in newtons, multiply 4.4 pounds by 4.45 newtons/pound. This gives us an approximate weight of 19.58 newtons, which is closest to option D) 20 N.
To convert the weight of a metal bar from pounds to newtons, you would multiply the weight in pounds by the conversion factor of 4.44822, since 1 pound is approximately equal to 4.44822 newtons.
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True or false the amount of solar radiation an area receives is dependent on the angle of the energy and whether it is filtered through the atmosphere
Anything that has mass and volume is the definition of
A van slows down as it travels up a steep hill. Its speed goes from 20m/s at the bottom of the hill to 12m/s when it reaches the top 8 seconds later. How far has the van travelled between the bottom and the top of the hill?
Answer
13.06 m
Explanation
The height reach ca be calculated using the one of the linear equation.
v² = u² - 2gs
where u ⇒ is the initial speed,
v ⇒ is the final speed
g ⇒ is the acceleration due to gravity and
s ⇒ the height reached.
v² = u² - 2gs
12² = 20² - (2×9.8×s)
144 = 400 - 19.6s
19.6s = 400 - 144
= 256
s = 256/19.6
= 13.06 m
Answer:
d = 128 m
Explanation:
Here given that van slows down as it travels up a inclined steep hill
So here we can assume that through out the motion its acceleration will remain constant.
Now we can use kinematics to find out the distance traveled by it
As we know that acceleration is defined as
[tex]a = \frac{v_f - v_i}{t}[/tex]
here we know that
[tex]v_f = 12 m/s[/tex]
[tex]v_i = 20 m/s[/tex]
time = 8 s
now we have
[tex]a = \frac{12 - 20}{8} = -1 m/s^2[/tex]
Now in order to find out the distance it moved we can use
[tex]v_f^2 - v_i^2 = 2 ad [/tex]
now we will plug in all above data
[tex]12^2 - 20^2 = (2)(-1)d[/tex]
[tex]144 - 400 = -2d[/tex]
[tex]d = \frac{-256}{-2} = 128 m[/tex]
so it will cover total distance of 128 m
What substances were found in the innermost regions (within about the inner 0.3 au) of the solar system before planets began to form?
For our statistical definition of entropy, we use the equation S = klnW. In this equation, what does k represent?
The entropy is the measure of change in the thermal energy of a system and K in the formula represents Boltzmann constant.
What is Entropy?Entropy is the measure of a system's thermal energy per unit of the temperature which is unavailable for doing any useful work. Because, work is obtained from the ordered molecular motion of the object, the amount of entropy is a measure of the molecular disorder, or the randomness of a system.
The entropy can be calculated by the formula:
S = klnW
where, k is the Boltzmann constant per molecule (particle), which is equal to 1.38 × 10⁻²³J/(K. particle). And, from this equation the entropy change of the object, ΔS, for a system can be related to the change in the number of microstates which is represented as:
ΔS = kln (Wfinal-Winitial)
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what is true about pluto?
Pluto, a dwarf planet, has a unique orbit and composition, distinct from other planets in the solar system.
Pluto is considered a dwarf planet and is distinct from the gas giants in the solar system, being small, icy, and rocky. Its orbit is unique, shaped like a long ellipse and tilted compared to other planets. Initially thought to be a terrestrial planet, subsequent discoveries led to its reclassification as a dwarf planet.
A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. the scale reads 849 n. as the elevator moves up, the scale reading increases to 934 n, then decreases back to 849 n. the acceleration of gravity is 9.8 m/s 2 . find the acceleration of the elevator. answer in units of m/s 2 .
Actual weight W = mg = 849
N
mass m = 849 / g = 86.54
kg
apparent weight m ( a+ g ) = 934 N
(a + g) = 934 / m = 10.79
from this acceleration a = 10.79 - g
= 10.79-9.8
= 0.9827 m / s^ 2
A 1.50-liter sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°C. Without changing the temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.00 atmospheres. The volume of the gas is _____.
The volume of the gas after the change of pressure will be 4.5 litres.
What is Boyle's law?Boyle's law, also known as the Boyle-Mariotte law or Mariotte's law, is an experimental gas law that states that as a container's volume grows, a gas's pressure tends to drop. The temperature remains constant.
Given that a 1.50-litre sample of dry air in a cylinder exerts a pressure of 3.00 atmospheres at a temperature of 25°C. Without changing the temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.00 atmospheres.
Use Boyle's law:-
P₁V₁ = P₂V₂
Put the values of initial pressure, volume and final pressure then calculate the value of final volume as the temperature of the process is constant.
1.50 x 3.00 = V x 1.00 atm
V₂ = 1.50 x 3.00 / 1.00
V₂ = 4.50 L
Therefore, the volume of the gas will be 4.5 litres.
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Normal faults that come in pairs usually display the geological feature of _____.
monoclines
anticlines and synclines
horsts and grabens
fault-block mountains
Your car and the trailer it is towing are initially at rest. you apply an acceleration of 1.75 m/s2 to get the vehicles moving. the mass of your car is 1200 kg and the mass of the trailer is 540 kg. (a) determine the net force acting on the car.
Final answer:
The net force acting on the car, which is towing a trailer, is calculated using Newton's second law of motion and is found to be 3045 newtons.
Explanation:
To determine the net force acting on the car, we use Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma). Since the car and trailer are initially at rest and they start to accelerate together, the net force on the car can be calculated by adding the masses of the car and the trailer and then multiplying the total mass by the given acceleration.
First, we find the total mass of the car and the trailer combined: total mass = mass of car + mass of trailer = 1200 kg + 540 kg = 1740 kg. Then, we multiply this total mass by the given acceleration to find the net force:
Net force = total mass × acceleration = 1740 kg × 1.75 m/s² = 3045 N.
Therefore, the net force acting on the car is 3045 newtons.
Momentum Monster does 600,000 joules of work in 10 seconds. How much power is that in watts?
I think it's 60,000, but I need someone who knows for sure whether this is correct or not.
How does the width of the visible spectrum compared to that of the entire electromagnetic spectrum?
The visible spectrum is a very small part of the electromagnetic spectrum, the entire electromagnetic spectrum ranges from extremely short gamma rays to very long radio waves. Thus, the visible spectrum constitutes only a tiny fraction of the total electromagnetic wavelengths.
The visible spectrum is just a small part of the entire electromagnetic spectrum. The electromagnetic spectrum includes all types of electromagnetic radiation, which travel in waves and vary greatly in their wavelengths.
The visible light portion covers wavelengths from about 400 to 700 nanometers (nm), which we perceive as the colors of the rainbow ranging from violet to red.In contrast, the entire electromagnetic spectrum spans a much broader range of wavelengths, from very short gamma rays (less than one picometer) to very long radio waves (up to kilometers in length). This means the visible spectrum constitutes only a tiny fraction of the total range of electromagnetic wavelengths. To put it into perspective, the electromagnetic spectrum covers about 20 orders of magnitude in wavelength, while the visible spectrum spans just a fraction of one order of magnitude.It is 6.00 km from your home to the physics lab. as part of your physical fitness program, you could run that distance at 10.0 km/hr (which uses up energy at the rate of 700 w ), or you could walk it leisurely at 3.00 km/hr (which uses energy at 290 w ).
Birds sitting on a single power line don't get shocked because there is no path for the current to flow to the __________.
Answer:
Ground.Explanation:
Basically, the reason why birds don't get electrically shocked, it's because they only reach a single path of the current. However, if they are able to toch something connected to the groun while they are on a cable, they will be shocked, becuase they are completeling the electrical cicle needed to flow the electricity.
Having said that, even a person can do that. Someone can grab a single power line without touching the ground or other cable, and that person will be fine, there can be thousands of volts and amperes, but that person will be totally fine.
Therefore, the word missing here is ground.
Birds sitting on a single power line don't get shocked because there is no path for the current to flow to the ground.
If a rocket is propelled while in space, is the momentum of the rocket itself (not including the exhaust products) conserved?
No, momentum of the rocket itself will not be conserved as the net external force on the rocket itself is not zero.
Further explanation
When a rocket leaves the ground they need a huge amount of thrust to lift off from the ground. This is not an easy task to lift off from the ground due to the heavy weight of the rocket. Generally Liquid fuels are used as a propellant in the rocket.
Given:
A rocket is propelled in the space.
Concept:
The logic behind the momentum conservation is Newton’s third law.
A force is defined as the rate of change of momentum with respect to time.
Mathematically,
[tex]\boxed{\vec F = \dfrac{{d\vec p}}{{dt}}}[/tex]
If net external force on a particle is zero, the rate of change of momentum will be zero so momentum will be constant.
[tex]\vec p = {\text{constant}}[/tex]
Thus, we can say momentum will be conserved. One point should be noticed that momentum is a vector quantity so vector sum is used while summing together momentum of two or more bodies.
Now for an isolated system, net external force on an isolated system is zero; therefore momentum is conserved for an isolated system.
When exhaust gases leaves the engine downward with a very high velocity, it exerts a reaction force on the rocket in upward direction. The action and reactions are equal in magnitude but the direction is opposite to each other. So if we consider rocket and exhaust gases as a system net force on the system will be zero and momentum will be conserved for (rocket+exhaust) system.
But if rocket itself is taken as a system, a reaction force (say N) acts on the rocket in upward direction which is responsible for lift off the rocket, therefore momentum cannot be conserved.
Thus, the momentum of the rocket itself will not be conserved as the net external force on the rocket itself is not zero.
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Answer Details:
Grade: High School
Subject: Physics
Chapter: Laws of motion
Keywords:
Rocket, propelled, space, momentum, not, conserved, reaction, upward, direction, balanced, force on rocket, launch, exhaust gas, rocket propulsion, momentum conservation.
In a crash test, a 2,500 kg car hits a concrete barrier at 1.3 m/s2. If the car strikes the barrier with a force of 3,250 N, how much resistance force does the barrier provide? N This pair of forces is an example of Newton’s law of motion.
The concrete barrier provides a resistance force equal to the car's impact force of 3,250 N, illustrating Newton's Third Law of Motion, wherein every action has an equal and opposite reaction.
Explanation:In the scenario where a 2,500 kg car hits a concrete barrier with a force of 3,250 N, it is important to understand Newton's laws of motion to determine the resistance force provided by the barrier. Newton's Third Law states that for every action, there is an equal and opposite reaction. Hence, the barrier would provide an equal resistance force of 3,250 N back on the car, as it is the action-reaction pair described by this law.
Newton's Third Law of Motion :
This situation exemplifies Newton's Third Law of Motion, which is often paraphrased as, 'To every action, there is always an opposed and equal reaction.' In crash tests and automobile mechanics, this law helps us understand and predict the forces involved during a collision. When the car exerts a force on the barrier, the barrier exerts an equal and opposite resisting force on the car, confirming that the car's impact force and the barrier's resistance force are indeed equal.
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If the coefficient of skewness is equal to zero, the shape of the distribution is __________.
A car travels at uniform acceleration over a distance of 440.0 m. Its final velocity after 20.0 s is 33.0 m/s. What is its initial velocity?
Since it is a uniform accelerated motion, we can use the following SUVAT equation that relates initial velocity, final velocity, time and distance covered:
[tex]S=\frac{1}{2}(v_i +v_f)t[/tex]
where
S=440.0 m is the distance covered
vi is the initial velocity
vf=33.0 m/s is the final velocity
t=20.0 s is the time
Re-arranging the formula and substituting the data, we can find the initial velocity:
[tex]v_i = \frac{2S}{t}-v_f=\frac{2(440.0 m)}{20.0 s}-33.0 m/s=11.0 m/s[/tex]
A toy cannon uses a spring to project a 5.31 g soft rubber ball. the spring is originally compressed by 5.09 cm and has a force constant of 7.99 n/m. when the cannon is fired, the ball moves 15.2 cm through the horizontal barrel of the cannon, and there is a constant frictional force of 0.0325 n between the barrel and the ball. (a) with what speed does the projectile leave the barrel of the cannon
The speed of the projectile as it leaves the toy cannon can be calculated by using the principle of conservation of energy and solving a related equation. Initially, the ballistic energy is all potential, stored in the spring, and this energy transfers into kinetic energy of the ball and work done against friction as it moves through the barrel.
Explanation:The speed of the projectile as it leaves the barrel can be calculated using conservation of energy and basic kinematics. Initially, the energy is all potential in the compressed spring. This energy is transferred into kinetic energy and work done against friction as the ball moves through the barrel. The equation for energy conservation could be written like this:
Initial Energy (from spring) = Final Energy (kinetic) + Work done against friction
0.5*k*x² = 0.5*m*v² + F_friction*d,
where k is the spring constant, x is the initial compression of the spring, m is the mass of the ball, v is the speed of the ball, F_friction is the force due to friction, and d is the distance the ball travels in the barrel.
Filling in the provided values and solving for the speed v, should give you the speed the ball leaves the barrel with.
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Your goal is to accelerate the particles to kinetic energy k. what minimum radius r of the cyclotron is required?
How many times does the kinetic energy of a car increase when traveling 60mph as opposed to traveling 30mph?
What is the mass of a shopping cart that is pushed with a net force of 10 N to accelerate at the rate of 0.5 m/s2?
Actualy the correct answer is going to be 20kg. And this how i got it. All i did was 10 divided by .5 and i got the answer.
Please mark brainiest please.
Force is the product of mass and acceleration. The force acting on the shopping cart is 10 N with an acceleration of 0.5 m/s². Then, mass of the cart is 20 Kg.
What is force?Force is an external agent acting on an object to change its state of rest or motion or to deform it. There are various kinds of forces, such as frictional force, magnetic force, gravitational force etc.
Newton's second law of motion states that, force of an objecting with a speed is the product of its mass and acceleration. Thus force increases with increase in mass or acceleration or with an increase in both together.
Given that, net force acting on the cart = 10 N
acceleration = 0.5 m/s².
Force = m a
mass m = F/a
= 10 N/ 0. 5 m/s²
= 20 Kg
Therefore, mass of the shopping cart is 20 Kg.
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When children use the word “doggie” to refer to every four-legged animal they see, __________ occurs.
Answer:
b trust me
Explanation: