<span>When a seed or plant is said to be inactive, it is dormant. Dormancy occurs when <span>a plant reduces its metabolic activity.</span></span>
Answer: B.Heat is never converted completely into mechanical energy.
Explanation:
According to the second principle of thermodynamics:
<em>"The amount of entropy in the universe tends to increase over time"
</em>
However the first formulation of this law (by Sadi Carnot) states:
<em>"There is an upper limit to the efficiency of conversion of heat to work, in a heat engine
"</em>
This means the heat cannot be completely transformed into mechanical energy in a machine. That is why a machine's effieciency is always less than 100%
"Acceleration" does NOT mean "speeding up".
"Acceleration" means ANY change in the speed or direction of motion.
An object can speed up, slow down, or turn a corner.
Each of these is an example of acceleration.