Which of the following statements is the most accurate? a. energy transfers are never 100% efficient. b. energy transfer is completely efficient. c. energy cannot be transferred to other forms. d. energy transfers can be used to create perpetual-motion machines.

A.Energy transfers are never 100% efficient

Explanation:

According to the  first law of thermodynamics energy can neither be created nor destroyed but it can be converted from one form to another. According to the second law of thermodynamics transfer of energy is never 100% efficient in a machine. There is always loss of energy due to wear and tear of the machinery.

d.) circle motion requires a force to give it a centripetal acceleration.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying