In this scenario a battery is used to supply chemical potential energy. the potential energy is transformed and produces kinetic energy. the battery causes a fan to spin and that kinetic energy can also be described as mechanical energy. check out the values for each: 100 j potential energy results in 75 j of kinetic energy. what conclusion can be drawn from the energy transformation diagram?

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An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

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