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cricket20 [7]
3 years ago
11

Kristina demonstrates a toy for her younger brother. The steps to operate the toy are listed below. Step 1. Push the toy down. S

tep 2. A spring compresses. Step 3. Release the toy. Step 4. The toy jumps into the air. Which best describes Step 4?
Physics
2 answers:
IRINA_888 [86]3 years ago
0 0
The object has potential and kinetic energy when it jumps into the air
Pavel [41]3 years ago
0 0

Answer:

A/ Elastic potential energy changes to gravitational potential energy

Explanation:

just took the test

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What is kinetic energy
Goshia [24]
<span>Kinetic energy is energy that a body possesses by virtue of being in motion.

Think of a windmill...

Windmills use the winds energy in order to spin and in doing so creates energy for other things to be powered.


</span>
6 0
3 years ago
A cyclist bikes in a straight line at an average velocity of 22 miles/hour east and I’m finishing a 100 mile race how much time
Svet_ta [14]

Answer:

Below

Explanation:

To calculate the time it took for the cyclist to finish their race, you can you this equation :

     time = displacement / velocity

Plug in your values....

     time = (100 mi) / (22 mi/h)

             = 4.54545454.... hours

As for sig figs in this question you would need to round this answer to 1 sig fig because 100 only has 1 sig fig. (you round to the lowest # of sig figs in the question)

     = 5 hours

It took the cyclist 5 hours to complete their race

Hope this helps! Best of luck <3

4 0
3 years ago
The magnetic field inside a 5.0-cm-diameter solenoid is 2.0 T and decreasing at 3.00 T/s . Part A What is the electric field str
Doss [256]

Given Information:

Diameter of solenoid = 5.0 cm

Magnetic field = B = 2.0 T

Rate of change of magnetic field = 3.0 T/s

Required Information:

Electric field strength inside the solenoid at a point on the axis = ?

Answer:

The electric field strength inside the solenoid at a point on the axis is zero.

Explanation:

From the Faraday's Law

E = -r/2 dB/dt

Where dB/dt is the rate of change of magnetic field and r is zero because the distance from the axis is zero.

Therefore, electric field strength inside the solenoid at a point on the axis is 0.

7 0
3 years ago
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad/s ). If a particular disk is spun at 998
wlad13 [49]

Answer:

<em>1988.05 rad/s^2</em>

<em></em>

Explanation:

The angular speed of the optical disk ω = 998.0 rad/s

the time taken to come to rest t = 0.502 s

The magnitude of the average angular acceleration ∝ = ω/t

∝ = 998.0/0.502 = <em>1988.05 rad/s^2</em>

7 0
3 years ago
14. Why is it cooler to wear a white shirt than a black shirt on a hot, sunny day?
zzz [600]

Answer:

White or lighter colored, shirt REFLECTS most of the visible wavelengths or all colors of light while a black or dark shirt ABSORBS more wavelengths.

So, Absorbed radiation is converted into heat, making the darker or black shirt warmer to wear.

 

<u>-TheUnknownScientist</u><u> 72</u>

7 0
3 years ago
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