Which of the following represents the brightness of a celestial object measured from Earth?

Absolute brightness

Apparent magnitude

Luminosity

Proto-star

Any energy transformation involves the loss of some energy as A. motion. B. electric charge. C. light. D. heat.

A ball rolls horizontally off a table of height 0.6 m with a speed of 9 m/s. How long does it take the ball to reach the ground?

Two charged particles are located on the x axis. The first is a charge 1Q at x 5 2a. The second is an unknown charge located at x 5 13a. The net electric field these charges produce at the origin has a magnitude of 2keQ / a2.

A student pushes glider on an air track with a force of 2.0 N for 4.0 seconds over a distance of 1.0 M. How much work did the student do on the glider? A. 0.20J B. 0.50J C. 2.0J D. 5.0J

An astronaut has a mass of 100 kg and has a weight and if 370 N on Mars. What is the gravitational strength on Mars?

Which of these could NOT be used to find the mechanical advantage of an inclined plane? A. input force B. output force C. percent efficiency D. length and height of inclined plane

What are the Rules of magnetism

Two spheres of the same radius, but of different masses, are both fully submerged in water. The lighter sphere is held below the water line by a rope anchored to the bottom of the container. The heavier sphere is suspended from a rope.

How does an increase in thermal energy affect molecules?

Which of the following is an example of applied research?