A 66-kg skier starts from rest at the top of a 1200-mlong trail which drops a total of 230 m from top to bottom. at the bottom, the skier is moving 11.0 m/s. how much energy was dissipated by friction?

What is one example of reusing water? A. Taking shorter showers B. watering the yard in the morning C. watering water with dirty dish water D. Turning off water in the sink while brushing teeth

A lever allows a 35 N load to be lifted with a force of 7 N. What is the mechanical advantage of the lever?

A beam of light is incident from air onto the surface of a liquid. When the angle of incidence is 45.0° the angle of refraction is found to be 36.0°.

Consider the basic postulates of kinetic molecular theory given below: The size of a gas particle is negligibly small. The average kinetic energy of a particle is proportional to its temperature in kelvins.

A circular arc has a uniform linear charge density of 4 nC/m. 287 ◦ 2.5 m x y What is the magnitude of the electric field at the center of the circle along which the arc lies? The value of the Coulomb constant is 8.98755 * 109 N · m2 / C 2.

Imagine that you replace the block in the video with a happy or sad ball identical to the one used as a pendulum, so that the sad ball strikes a sad ball and the happy ball strikes a happy ball.

Under what conditions will an object experience a gravitational force? Under what conditions will an object experience an electric force? Under what conditions will an object experience a magnetic force?

A basketball player pushes down with a force of 34 N on a basketball that is inflated to a gauge pressure of 9 x 104 Pa. What is the diameter of contact between the ball! and the floor?

Match these terms with their definitions: 1. unit of electrical resistance ampere 2. unit of electromotive force or electrical potential ohm 3. unit for measuring the strength of an electric current volt 4. unit of electrical power watt

In which is momentum conserved: an elastic collision or an inelastic collision?