A new planet has been discovered that has a mass one-ninth that of Earth and a radius that is half that of Earth. Determine the free fall acceleration on the surface of this planet. Express your answer in the appropriate mks units.

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.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

If a star is moving toward earth, it is