In a practical machine, the power output is smaller than the power input. considering the law of energy conservation, what can explain this occurrence? a. some of the energy going into the machine is being created at a quicker rate than the energy coming out is being destroyed. b. some of the energy coming out of the machine is being destroyed. c. some of the energy is used to combat friction, and thus is transformed from mechanical energy to heat. d. some of the energy going into the machine is being destroyed.

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative