mass gram, time sec, temp kelvin, vol liter, dens grams/cm3
The initial kinetic energy of the car is
Then, the velocity of the car is decreased by half:
so, the new kinetic energy is
So, the new kinetic energy is 1/4 of the initial kinetic energy of the car. Numerically:
Hope this helps!!!!!!!!!!!!!
The heat of fusion must be approx from 0 to infinity