50 *15=750
work is force time distance times angle between both vectors
here the angle is 0.
The answer is 2) 1.0c. Light will always propagate through a vacuum at the speed of light “c”; even when moving at a significant fraction of the speed of light, observers will still measure this as the speed of light and the difference is resultant of time dilation.
Explanation:
Particles in solids are always vibrating (moving back and forth) in place.
C. has to be right, also its the only one that makes sense.
Hope this helps!