Answer:
Since the momentum of the body remains constant ( conserved) the trolley slows down (its velocity reduces) since its mass increases.
To solve the exercise it is necessary to take into account the concepts of wavelength as a function of speed.
From the definition we know that the wavelength is described under the equation,
![\lambda = \frac{c}{f}](https://tex.z-dn.net/?f=%5Clambda%20%3D%20%5Cfrac%7Bc%7D%7Bf%7D)
Where,
c = Speed of light (vacuum)
f = frequency
Our values are,
![f = 2Hz](https://tex.z-dn.net/?f=f%20%3D%202Hz)
![c = 3*10^8km/s](https://tex.z-dn.net/?f=c%20%3D%203%2A10%5E8km%2Fs)
Replacing we have,
![\lambda = \frac{c}{f}](https://tex.z-dn.net/?f=%5Clambda%20%3D%20%5Cfrac%7Bc%7D%7Bf%7D)
![\lambda = \frac{3*10^8km/s}{2Hz}](https://tex.z-dn.net/?f=%5Clambda%20%3D%20%5Cfrac%7B3%2A10%5E8km%2Fs%7D%7B2Hz%7D)
![\lambda = 1.5*10^8m](https://tex.z-dn.net/?f=%5Clambda%20%3D%201.5%2A10%5E8m)
<em>Therefore the wavelength of this wave is
</em>
Answer: 200 N/m
Explanation:
The Gravitational spring energy(Us) is equal to 1/2kx^2. So we have x as .2 m and Us as 4 N. So 4 N = 1/2 * k * .2^2. So now we solve for K and get 200 N/m.
Answer:
These energy exchanges are not changes in kinetic energy. They are changes in bonding energy between the molecules. If heat is coming into a substance during a phase change, then this energy is used to break the bonds between the molecules of the substance. The example we will use here is ice melting into water.
Explanation:
<span>D. density is your answer</span>