An empty train car moving at 21 m/s collides with a loaded train car initially at rest that has twice the mass of the empty car. The two cars couple together. a) What is the final velocity of the cars after the collision? 7 m/s
b) Is kinetic energy conserved in this collision? If so, how do you know? If not, why is there a difference?

a, c, d, e are all applying about success strategies.

0.11 m/s and 0.28 m/s should be correct

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table

energy stored in the capacitor= 9.72 x 10⁻⁴ j

explanation:

the energy stored in the capacitor is given by

e= 1/2 c v²

e= energy stored

c= capacitance= 1.5 µc= 1.5 x 10⁻⁶f

v= potential difference=36 v

so energy stored= e= 1/2 (1.5 x 10⁻⁶) (36)²

energy stored= 9.72 x 10⁻⁴j