When melting, energy is being absorbed. When freesing, energy is being released.
That's all I know.
Electrostatic (it’s a combined word) that’s all what i know honestly, hope it helps:)
Thats hard. i would have to say work the problem out
A change in velocity is called 'acceleration'.
That means any change in speed or direction of the motion.
The pillow will continue to go forward as Newton's first law states that an object will continue in it's path unless another force acts upon it