Question

A) State the law of conservation of energy B) define efficiency​

Answer 1

A. the law of conservation of energy states that the amount of energy is neither created nor destroyed. ... For example, when you roll a toy car down a ramp and it hits a wall, the energy is transferred from kinetic energy to potential energy

B. Efficiency signifies a peak level of performance that uses the least amount of inputs to achieve the highest amount of output. ... It minimizes the waste of resources such as physical materials, energy, and time while accomplishing the desired output

Answer 2

$\huge\sf{\underline{Answer}}$

(A) The law of conservation of energy states that energy can not destroyed nor created. It may be transform from one form to another.

Example : - Energy can never remain stored forever in any substance or living thing.

(B) Efficiency is defined as ability to produce something with minimum amount of efforts.

Example : - Reduction in the number of workers to make a car.