Compare the potential energy of a 5 lb ball at the top of a 5 foot hill and a 5 lb ball at the top of a 10 foot hill. question 4 options: their potential energies are the same because they have the same mass. the ball at the top of the 5 foot hill has more potential energy. the ball at the top of the 5 foot hill has less potential energy. potential energy doesn't depend on a object's relative height.

Why does the input force have to be greater than the force needed to lift the bale?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?