calculate a metal wire of length 1.2m and cross sectional 0.0000002 M square is stressed by a force of 50 N assuming the force constant of material or the wire is 6000 N/M. calculate the tensile stress, tensile strain, young modulus​

What are the differences and similarities of a compression wave and a transverse wave?

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.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.