A grasshopper jumps straight up at 5.33 m/s. How much time does it take for it to return to earth? If u know please help.

Answers

Answer 1
1) Time to get the highest point of it pathway>

Vf = Vo - g*t

Vf = 0 (condition of maximum height)
Vo = 5.33 m/s
g = 9.81 m/s

=> t = Vo / g = 5.33 m/s / 9.81 m/s = 0.543 s

2) Time to return from the highest point = time to get to the highest point = 0.543 s

Total time = 0.543s + 0.543 s = 1.086 s ≈ 1.09 s

Answer: 1.09 s
Answer 2

Answer:

1.09

Explanation:


Related Questions

Ptolemy's model was __________, with the earth fixed in the center of the universe.

Answers

The answer to this question would be Geocentric.

In the earlier day before heliocentric found, many people believe that earth is the core of the galaxy. That means the other planet and the sun are moving around it.  This theory was already proven wrong and the theory is now changed into heliocentric which state the sun is the center of the galaxy.

When you drop a sugar cube in a glass of water, at first the water doesnât taste sweet. later, it tastes very sweet.what causes the change in the waterâs taste?

Answers

the sugar dissolves.

Bob is pushing a lawn mower up a hill with the mower tilting slightly to the right. suppose that we wish to use vectors to determine the total force acting on the mower. what forces should be considered?

Answers

Answer:

Applied force, weight, normal force and frictional force

Explanation:

Bob is pushing a lawn mower up a hill with the mower tilting slightly to the right. We have to write the forces acting on the mower.

The following are the forces that are acting on the mower.

1. Applied force - The force with which Bob is pushing a lawn.

2. Weight - Its weight is equal to, W = m g

3. Normal force - that balances its weight

4. Frictional force - It always opposes the motion of the mower.

Hence, this is the required solution.

The lawn mower is acted upon by four different forces.

Vector quantities are those quantities that posses both magnitude and direction. Force is a vector quantity. Hence, the resultant force acting on a lawn mover can be obtained as the resultant of the four forces that act on the mower.

The four forces that act on the lawn mower are;

Applied forceFrictional forceWeight of the mowerNormal reaction

Hence, the lawn mower is acted upon by four different forces.

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How much work does the up escalator do on you when you ride it from the lower level to the upper level?

Answers

A=ΔEp
A=Ep2-Ep1
A=mgH2-mgH1
A=mg(H2-H1)

You push forward on a car with a force of 150 N, but the car does not move. What is the net force on the car?

Answers

Nothing no work is being done
The net force is 0 because the car isn't moving while you're applying force to it

Electromagnetic radiation with a wavelength of 445 nm appears as blue light to the human eye. the energy of one photon of this light is ________ j.

Answers

Final answer:

The energy of one photon of light with a wavelength of 445 nm can be calculated using Planck's equation, E = hv. This requires converting the wavelength to frequency using c = wavelength times frequency, and then substituting the frequency back into Planck's equation. The energy of one photon of 445 nm blue light is approximately 4.47 x 10^-19 Joules.

Explanation:

To determine the energy of one photon of light with a wavelength of 445 nm (visible light electromagnetic radiation), we can use Planck's equation, which states E = hv (energy equals Planck's constant times frequency). However, we must first convert wavelength to frequency via the speed of light equation (c = wavelength times frequency). After getting the frequency, we can substitute it back into the Planck's equation.

By doing these calculations, we find:

First, we convert the wavelength from nm to m: 445 nm = 445 x 10^-9 m.Next, we determine the frequency (v) using c = wavelength(v). Since c = 3.00 x 10^8 m/s:
v = c/wavelength = (3.00 x 10^8 m/s) / (445 x 10^-9 m) = 6.74 x 10^14 Hz.Finally, we calculate the energy using E = hv:
E= h x v = (6.63 x 10^-34 J.s) x (6.74 x 10^14 Hz) = 4.47 x 10^-19 Joules.

Therefore, one photon of 445 nm blue light has an energy approximately equal to 4.47 x 10^-19 Joules.

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PLEASE HELP NOW!! Which of the following must be the same for two isotopes of an element?
A. The number of neutrons
B. The atomic number
C. The mass
D. The charge

Answers

B. The atomic number

<<<<<<<<<< B is the answer >>>>>>>

A ball thrown with 50N of force accelerates at 25 m/s2.  What is the mass of the ball?

Answers

F=ma
Force is 50N. Acceleration is 25 m/s^2.
50N=m*25 m/s^2
Divide both sides by 25.
mass=2 kg

the contribution of Tycho Brahe was primarily his
calculations
observation
inventions
theories

Answers

Tycho Brahe ( 1546 - 1601 ) was a Danish astronomer known for his accurate astronomical and planetary observations. Tycho tried to produce a model with the best of both Ptolemy ( earth-centered solar system ) and Copernicus ( sun-centered solar system ).
Answer: B ) observation.

The angular speed of the minute hand of a watch is:

Answers

The angular speed of the minute hand of a watch is:
-- one revolution per hour
-- 2 pi radians per hour
-- 360 degrees per hour
-- 6 degrees per minute
-- 0.1 degree per second
Final answer:

The angular speed of the minute hand of a watch is calculated by dividing the total angle of rotation (2π rad) by the period of rotation (3600 s), which equals 0.1047 rad/min. This indicates the degree of the minute hand's rotation per minute. The right-hand rule also designates the angular velocity's direction.

Explanation:

The angular speed of the minute hand of a watch refers to the degree of rotation of the minute hand per unit of time. In the particular case of a watch, the minute hand completes one full revolution (360° or 2π rad) in one hour (60 minutes or 3600 seconds). Therefore, the angular speed ω can be calculated as the total angle of rotation (2π rad) divided by the period of rotation, which is 3600 seconds.

Thus, the angular speed is calculated as ω = 2π rad/3600 s. By converting this to radian per minute, which is a more typical unit for a watch, we obtain that the angular speed of the minute hand of a watch is 0.1047 rad/min. This means that in each minute, the minute hand rotates 0.1047 radians.

This concept and calculation is part of what's studied in rotational motion in physics, where the right-hand rule can also be used to determine the direction of the angular velocity vector.

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Liz rushes down onto a subway platform to find her train already departing. she stops and watches the cars go by. each car is 8.60 m long. the first moves past her in 1.80 s and the second in 1.66 s. find the constant acceleration of the train.

Answers

 

The average velocity can be calculated using the formula:

v = d / t

For the 1st car, the velocity is calculated as:

v1 = 8.60 m / 1.80 s = 4.78 m / s

While that of the 2nd car is:

v2 = 8.60 m / 1.66 s = 5.18 m / s

 

Now we can solve for the acceleration using the formula:

v2^2 = v1^2 + 2 a d

Rewriting in terms of a:

a = (v2^2 – v1^2) / 2 d

a = (5.18^2 – 4.78^2) / (2 * 8.6)

a = 0.23 m/s

 

Therefore the train has a constant acceleration of about 0.23 meters per second.

The. Is the time it takes for a wave to complete one cycle

Answers

Period, that's the solution

Answer:

Time period

Explanation:

The time taken by a wave to complete one cycle is called the time period of a wave. It is denoted by T. The number of vibration per second is called the frequency of the wave.

The relation between the time period and the frequency is inverse i.e.

[tex]T=\dfrac{1}{\nu}[/tex]

If the number of vibrations increases its time period will decrease.

Similarly, for a simple pendulum the time period to complete one cycle is :

[tex]T=2\pi\sqrt{\dfrac{l}{g}}[/tex]

l and g are length of pendulum and acceleration due to gravity.

Which one of the following does not accurately describe the universal gravitational law? A. Gravitational force is proportional to the square of the distance between the centers of both bodies. B. The object with the smaller mass does most of the moving because the object with the larger mass has too much inertia to move any noticeable amount. C. Gravitational force is proportional to the product of the two masses. D. Every object in the universe that has mass attracts every other object in the universe that has mass.

Answers

A. Gravitational force is proportional to the square of the distance between the centers of both bodies.

FALSE:

Gravitational force is inversely proportional to the square of the distance between the centers of both bodies.

Which you can see from the formula: F = G * [m*M] /(d^2)

As you see in the equation, d^2 is in the denominator so the bigger d^2 (the square of the distance between the centers) of the objects the smaller the gravitational force.

B. The object with the smaller mass does most of the moving because the object with the larger mass has too much inertia to move any noticeable amount.

TRUE:

F = mass * acceleration => acceleration = F / mass => the larger the mass the smaller the acceleration.


C. Gravitational force is proportional to the product of the two masses.

TRUE:

F = G [m*M] / (d^2)

The product of the two masses, m*M, is in the numerator, so F is proportional to this product.

D. Every object in the universe that has mass attracts every other object in the universe that has mass.

TRUE: that is a Universal Law discovered by Sir Isaac Newton.

While standing near a bus stop, a student hears a distant horn beeping. The frequency emitted by the horn is 440 Hz. The bus is traveling at 20.0 m/s, and the speed of sound is 330 m/s. What frequency will the student hear at each point in the bus's motion?
A. 468 Hz while approaching, 440 Hz through the crossing, 415 Hz while receding
B. 415 Hz while approaching, 440 Hz through the crossing, 468 Hz while receding
C. 440 Hz while approaching, 415 Hz through the crossing, 400 Hz while receding
D. 505 Hz while approaching, 440 Hz through the crossing, 438 Hz while receding

Answers

Answer:

A. 468 Hz while approaching, 440 Hz through the crossing, 415 Hz while receding

Explanation:

When bus is approaching the stand where boy is standing then the frequency is given as

now we know that

[tex]f_0 = 440 Hz[/tex]

[tex]v = 330 m/s[/tex]

[tex]v_b = 20 m/s[/tex]

frequency is given by

[tex]f_1 = f_0 \frac{v}{v - v_b}[/tex]

now plug in the data in the equation

[tex]f_1 = 440 \times \frac{330}{330 - 20}[/tex]

[tex]f_1 = 468 Hz[/tex]

Now when bus is moving away from the bus stop then frequency is given as

[tex]f_2 = f_0 \frac{v}{v + v_b}[/tex]

[tex]f_2 = 440 \times \frac{330}{330 + 20}[/tex]

[tex]f_2 = 415 Hz[/tex]

so here correct answer would be

A. 468 Hz while approaching, 440 Hz through the crossing, 415 Hz while receding

What process is used when electrons are transferred from one object to another to produce static electricity?

Answers

You may have notice when you accidentally rubbed your arm with another, a 'spark' happens. This is a consequence of static electricity. When two objects are rubbed together, the electrons get excited and collide which each other producing the 'spark'. This process is called friction.

Are all neon lights made up of neon gases

Answers

The answer is true! yes

goodluck my friend :-)

Only a _______ technician may wear the ASE insignia on his or her uniform. A. full-time B. certified C. qualified D. dues-paying

Answers

The answer is "B".
Doesn't it seem right to add that in the answer?

Answer:

B. Certified

Explanation: I agree with the other person and i also believe it is correct

A car accelerates from rest at a constant rate of 2m/s2 for 5s. what is the speed of a car at the end of that time?

Answers

Good afternoon.


We have:

[tex]\mathsf{V_0 = 0}\\ \mathsf{a = 2 \ m/s^2}\\ \mathsf{t = 5 \ s} [/tex]

The function of velocity:

[tex]\mathsf{V = V_0+at}\\ \\ \mathsf{V = 0 + 2t}\\ \\ \mathsf{V = 2t}[/tex]


For t = 5 s:

[tex]\mathsf{V = 2\cdot 5}\\ \\ \boxed{\mathsf{V = 10 \ m/s}}[/tex]

F a thermometer is calibrated to the nearest degree, to what part of a degree can you estimate the temperature it measures?

Answers

Readings are to the nearest 1/10, 0.1, or 0.01.

By dividing the temperature by two and adding 30 to the result, you can convert a temperature in Celsius to Fahrenheit. You will receive a rough temperature in Fahrenheit from this.

What is the reason Fahrenheit used instead of Celsius?

For more accurate temperature measurements, use Fahrenheit. Additionally, it is preferable since people are more concerned about air temperature than water temperature.

Because of these factors, we ought to embrace Fahrenheit as a unit of temperature measurement rather than reject it in favor of its metric equivalent.

Fahrenheit and Celsius temperature scales are seen on the majority of thermometers. Read the °F figures (degrees of Fahrenheit).

Therefore, To get a more accurate approximation, multiply the temperature by 2, take out 10%, and then add 32 to the result.

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Determine the density of a rectangular piece of concrete that measures 3.7 cm by 2.1 cm by 5.8 cm and has a mass of 43.8 grams.

Answers

It is customary to work in SI units.

Calculate the volume of the concrete.
V = 3.7*2.1*5.8 cm³ = 45.066 cm³ = 45.066 x 10 ⁻⁶ m³

The mass is  43.8 g = 43.8 x 10⁻³ kg

The density is mass/volume.
Density = (43.8 x 10⁻³ kg)/(45.066 x 10⁻⁶ m³) = 971.9 kg/m³

Answer: 971.9 kg/m³
Final answer:

The density of the concrete is approximately 0.965 g/cm³. The result does not support the statement that rebar is mostly iron.

Explanation:

The density of a substance can be calculated by dividing its mass by its volume. In this case, the mass of the concrete is 43.8 grams and the volume is calculated by multiplying the length, width, and height, which is 3.7 cm x 2.1 cm x 5.8 cm = 45.4014 cm³ (rounded to the nearest 0.0001 cm³). Therefore, the density of the concrete is 43.8 g / 45.4014 cm³ ≈ 0.965 g/cm³.

(b) Since the density of the concrete in (a) is less than the density of iron (approximately 7.87 g/cm³), the result does not support the statement that rebar is mostly iron.

A boy yells in a narrow valley. The sound reflects off of a boulder that is 80 m away. How long will it take to hear the echo if the speed of a sound wave is 320 m/s?

Answers

[tex]Given:\\v=320 \frac{m}{s}\\s=2\cdot 80m=160m\\\\Find:\\t=?\\\\Solution:\\\\v= \frac{s}{t} \;\;\;/\cdot t\\\\vt=s\;\;\;/v\\\\t= \frac{s}{v} \\\\t= \frac{160m}{320 \frac{m}{s}} =0.5s[/tex]

Answer:

0.50 s

Explanation:

you're welcome

What is the half-reaction that occurs at the cathode during the electrolysis of molten potassium bromide?

Answers

Final answer:

During the electrolysis of molten potassium bromide, the half-reaction that occurs at the cathode is the reduction of potassium ions (K+) to form potassium metal (K).

Explanation:

The half-reaction that occurs at the cathode during the electrolysis of molten potassium bromide is the reduction of potassium ions (K+) to form potassium metal (K).

The half-reaction can be represented as:

2K+ + 2e- -> 2K

At the cathode, positive ions are reduced and gain electrons to form neutral atoms or molecules.

How do scientists determine the age of the solar system?

Answers

By studying meteorites which are the most ancient material in space.

Why do you lurch forward in a bus that suddenly slows? why do you lurch backward when it picks up speed? what law applies here?

Answers

The law applied here is Newton's first law, also known as, law of inertia.
This law states that: A body will retain its state of rest or motion unless acted upon by an external force.

If you are moving and the bus suddenly stops, your body will lurch forward trying to retain its state of motion until it comes to rest and changes its state by the external force acted on it.

If you are at rest and the bus suddenly moves, your body will lurch backwards trying to retain its state of rest and opposing the force of motion until it is forced to change its state by this force.

Final answer:

You lurch forward in a bus that suddenly slows due to Newton's First Law of Motion, or the law of inertia, which suggests an object in motion stays in motion unless acted on by an unbalanced force. When the bus accelerates, inertia causes you to feel pushed back as your body prefers to remain at rest. Understanding this law helps in recognizing the importance of safety measures like seatbelts.

Explanation:

Understanding Movement in a Bus: Newton's First Law of Motion

When a bus suddenly slows down, you lurch forward because of Newton's First Law of Motion, also known as the law of inertia. This law states that an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Since your body wants to keep moving at the same speed the bus was going before it slowed down, you lurch forward when the bus decelerates.

Similarly, when the bus speeds up, you might feel like you are being pushed back into your seat. This is again due to the law of inertia. Your body wants to remain at its state of rest (or moving at a constant speed if the bus was already moving), so when the bus accelerates, it creates a temporary imbalance, making you feel pushed back.

Using seatbelts or holding onto something stable inside the bus can counteract these effects by providing the necessary force to keep you in place, thereby preventing injury and ensuring safety.

Why Understanding Newton's First Law is Important

The applications of Newton's First Law are seen in everyday life, not just in theoretical physics. It explains a wide range of phenomena, from why it's crucial to wear a seatbelt to the importance of headrests in preventing whiplash injuries. Understanding these principles can help improve personal safety and awareness in moving vehicles.

How much work is done when a 185 g tomato is lifted 17.9 m ?

Answers

A=mgh=0.185kg*9.81m/s2*17.9m=32.48J
Final answer:

The work done when lifting a 185 g tomato by 17.9 m is approximately 32.5 joules, calculated using the weight of the tomato as the force and the distance it is lifted.

Explanation:

To calculate the work done when lifting an object, we can use the formula Work (W) = Force (F) × Distance (D) × cos(θ), where θ is the angle between the force and the displacement. In the case of lifting an object vertically, the angle is 0°, so the cosine term is 1, and the equation simplifies to W = F × D. For a 185 g tomato lifted 17.9 m, we first need to convert the mass of the tomato to kilograms by dividing by 1000, which gives us 0.185 kg. The force is equal to the weight of the tomato, which is the mass (m) multiplied by the acceleration due to gravity (g = 9.8 m/s²), F = m × g. Thus, the force is F = 0.185 kg × 9.8 m/s² = 1.813 N. The work done is then W = 1.813 N × 17.9 m = 32.463 J, which we round to 32.5 J when expressing it with three significant figures.

In terms of energy, think about what happens when you eat a hot meal. Describe all the different forms of energy that you experience. For example, if you are eating under a lamp, its electromagnetic energy helps you see the food. Explain the source of each form of energy.

Answers

The blackbody radiation of hot food can be felt on the skin in addition to the convective heat over the food. The thermal energy of the food can be felt through conductive heat when the food is touched, either by the hand or the mouth. The chemical energy in the food will be transferred to your body through the digestive system.

If mechanical energy is conserved, then a pendulum that has a potential energy of 20 J at its highest point and 0.5 J at its lowest point has _____ as its kinetic energy at its lowest point.

20 J
0.5 J
19.5 J
20.5 J

Answers

At the highest point: kinetic energy is 0 due to the speed  is 0

So the total mechanical energy is 20

Assume no frictions present, then the mechanical energy is conserved

So at the lowest point, kinetic energy = mechanical energy - potential energy

Answer will be 20 - 0.5 = 19.5 J

Answer:

The third answer is correct:)

Explanation:

A magnetic field applies forces on:
a.static charges
b.moving charges
c.water flow

Answers

The force you are mentioning is called Laurentz Force. 

By definition, F = qvB, where q is the charge of the particle, v is the velocity, and B is the field intensity.

Therefore, the particle must be of moving charge.

Answer:

its b on oddessey ware

Explanation:

Describe at least 2 resources (i.e. places, people, books, etc.) that can help you to maintain the life of your car.

Answers

Properly maintaining of you car can reduce future repair costs, optimize the car’s performance, maintain its value and extend its life. 
In order to maintain the life of your car the following resources are important:
1. Oil 
Changing the oil every 3000 miles is essential for your engine and so for the life of your car.
2. Places 
Driving your car on good roads (roads suitable for the type of car) will also maintain your car's performance and extend its life.
3. Regarding people as a resource, checking your car regular at auto mechanics.  

Moving your finger across a textured surface can produce vibrations that are interpreted as texture. these vibrations are defined as _____.​
a. ​temporal cues
b. ​parietal cues
c. ​spatial cues
d. ​olfactory cues

Answers

these vibrations are defined as : temporal cues
temporal cues is a form of vibrations that will be temporally stored in your brain before it processed.
Temporal cues is very important during speech recognition process and during identifying process of an object
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