Suppose the tip of the minute hand of a clock is two inches from the center of the clock. determine the distance traveled by the tip of the minute hand if 20 minutes have passed.

how do you set this up? (from the trig section on linear and angular velocity)

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

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.