Answer:
velocity
Explanation:
I think i dont really know
Answer:
In a collision, the velocity change is always computed by subtracting the initial velocity value from the final velocity value. If an object is moving in one direction before a collision and rebounds or somehow changes direction, then its velocity after the collision has the opposite direction as before.
Lasers r used to calculate the distance a continent has moved in a year and if this help plzmake it the brainiest answer thnxz
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Answer:

Explanation:
Molar mass of helium = 
for helium is 1.67
The velocity of helium in sound at any temperature is given by 
R is a constant 8.314 