Answer:
30 kilometers is a reasonable measurement
first is gamma Ray's, last is d
The difference between velocity and relative velocity is that velocity is measured with respect to a reference point which is relative to a different point. While relative velocity is measured in a frame where an object is either at rest or moving with respect to the absolute frame.
Answer:
1917723.40119 m/s
Explanation:
m = Mass of deuteron = 
k = Boltzmann constant = 
T = Temperature = 
RMS velocity is given by

The RMS velocity of the deutrons is 1917723.40119 m/s
The spring should have a greater displacement .
Greater spring constant = the more difficult it is to stretch a spring , due to stiffness.