Answer:
power is given by work done divide time taken
P=w/t
therefore Pt=w
270x42=11,340.J
Answer:
C. 50%
Explanation:
Lets consider that the mass of taffy is m and its initial velocity is u and final velocity is v. Momentum is conserved so we can write it as,

The initial kinetic energy = 
As the Kinetic energy partly converted into heat.
The final kinetic energy =
= 
Change in the kinetic energy = 
now we can determine the fraction of kinetic energy that has turned into heat
=
= 
= 50%
<span>Protozoa live in seas, rivers, lakes, ponds, decaying matters and soil</span>