The instantaneous velocity of the object is its speed and direction at that instant.
Total thermal energy is the answer to your question.
Work=f.d
Work=100*50 = 500
Power = work/time = 500/4
=125 watt
because water is loosely packed but when it is cold it becomes closely packed in order to form ice and thus the force attraction between them also increase.
-- Volume . . . made out of 3 dimensions of length
-- Density . . . made out of mass, and 3 dimensions of length
-- Area . . . made out of 2 dimensions of length
-- Acceleration . . . made out of length and time
<em>Mass</em> is not made out of anything else. It's fundamental. A few other fundamental things are length, time, and electric charge.