Answer:
The kinetic energy is 200.000 Joule (200KJoule)
Explanation:
We use the formula of kinetic energy:
Ec =1/2 x m x v^2
Ec=1/2 x 1000kg x (20m/s)^2 = 200.000Joule
200.000J/1000KJ/J=200 kJoule
<span>C. the puck's weight and the air blowing </span>
AC current .........,............
This actually means that the object which is emitting light spectrum is moving away from us.. how do you know that ? well.. it is clearly mentioned that it is a red shift so the wavelengths will stretched more . and thus the spectrum turns more reddish as it has higher wavelengths .. hence so called red shifts
