If the box weighs 40 newtons and is lifted a distance of 2 meters, how much work is done on the box?

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.

How do you tell if someone actually cares about you? and just say they do?

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?