It took 5 min to move a refrigerator. You did 3,150 J of work in the process. How much power was required to move the refrigerator? (Hint: you need to convert 5 minutes into seconds to get the correct answer)

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.

The density of a liquid could be found by using

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?