<h2>
Answer: 502.08 J</h2>
Explanation:
The heat (thermal energy) needed in to raise the temperature in a process can be found using the following equation:
(1)
Where:
is the heat
is the mass of the element (<u>water</u> in this case)
is the specific heat capacity of the material. In the case of water is
is the variation in temperature <u>(which is increased in this case)</u>
Knowing this, let's rewrite (1) with these values:
(2)
Finally:
Answer:
Explanation:
Given:
- Linear horizontal speed of the ball,
- distance travelled by the ball,
- angle rotated by the ball,
- radius of the ball,
<u>the time for which the ball travels:</u>
<u>Angular speed of the ball:</u>
<u>Now the tangential speed at the equator of the ball:</u>
(the tangential speed due to rotation and the linear speed are having the same direction)
Hmmm, no choices? No? Okay then... I believe it should be 9.0 J.
Answer: v = 20 m/s
Explanation: Solution:
Use the formula of Kinetic Energy and derive for v:
KE = 1/2 mv²
To find v:
v = √ 2 KE / m
= √ 2 ( 100000 J ) / 500 kg
= √ 400 m/s
= 20 m/s
The answer is potential for this question