We know that the law of conservation of energy states that energy can not be created or destroyed. it only changes form. consider this energy transformation diagram. assume that the energy input in this case is chemical potential energy and the useful energy output is kinetic energy, specifically a small fan to keep you cool. the diagram also shows how to calculate the efficiency of the fan. if the law of conservation of energy holds true, explain why the efficiency of the fan is not 100%.

Due to energy loss.

Explanation:

The law of conservation of energy states that energy can neither be created nor be destroyed. It can only change its states from one energy state to another.

The efficiency is defined as the ratio of output work to the input work. The efficiency of the fan is not 100%. Because some of the energy is lost in the form of heat and sound. No machine is 100% efficient. There is always some loss of energy takes place.

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles