A nonconducting slab with volume charge density has a finite thickness between z=− and z=+ and is infinite in the plane perpendicular to the z- axis. Enter the correct expression of the electric field inside and outside the slab. Express your answers in terms of , , z, and 0.

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

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 consumption of fossil fuels could be