-When the masses were 2 x 10^5 km apart, the gracitational force was 4 x 10^20 N. What is the force when the distance is halved and they are 1 x 10^5 km apart? -Describe a trend you notice in the (mathematical) relationship between distance and gravitational force.

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 fate of the electrons that interact with a specimen in an electron microscope?

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.