Calculate the kinetic energy of an 18 g projectile moving horizontally at .
Calculate the kinetic energy of an 18 g projectile moving horizontally at .
A motor is supplied with a power of 1 000 W. If the efficiency of this motor is , calculate the useful power and the lost power.
Is there heat transfer between two bodies with different temperatures when they are put in contact?
What mass of iron would require 1 450 cal of energy to raise its temperature by ?
The specific heat of iron is
An object with a mass of 2 kg is falling at a speed of . What is the kinetic energy of this object?