Energy is transfered when its moved from one object to another. The rate of energy transfered is called power. Work is the transfer of energy from one object to another.
Answer:
The net force is 21 N, and the bag will go to the right.
Explanation:
You can find the net force by adding both values of the boy and the girl, and then subtracting four from it. You can also figure out which direction its moving by looking at which side is exerting the most force, which would be the right side.
<em>Hope </em><em>it </em><em>helps</em><em>!</em>
Elastic Potential Energy because the elasticity in the string stores up the energy.
The correct answer is "3. Both increase"
In fact, the frequency of a vibrating string is given by

where L is the length of hte string, T the tension and

the linear mass density.
We can see that string is made shorter, L decreases, so the frequency f increases. And since the pitch has the same behaviour of the frequency, it increases as well.
<span>Wavelength = (speed) / (frequency)
Speed of EM radiation = 3 x 10⁸ m/s
Frequency (3 × 10¹⁹ Hz) ===> wavelength = 0.01 nanometer
Frequency (3 × 10¹⁶ Hz) ===> wavelength = 10 nanometers</span>
This is the region of X-rays.