Answer:8.8 m/s
Explanation:
Given
mass of train 
velocity of Train 
mass of another train 
Final velocity of both train 
Let 
be the velocity of 
before collision
As external Force is zero therefore change in momentum is zero
conserving Momentum
Answer:
C
Explanation:
Radiant= list onto solar panels, Electric= solar into power, Radiant= Electric into light
Distance = speed x time
= 1.5 x 6
= 9m
Answer:
Gravity and Distance As the distance between the alien and the surface of the planet increases, the force of gravity decreases. This relationship is true in all cases: as the distance increases between any two objects, the gravitational force gets much smaller very fast in an inverse square relationship .
Explanation:
For an adiabatic process Heat is not allowed to cross the boundary of the system.
So:
E.no heat flows into or out of the system
