Find the orbital speed v of a satellite in a circular orbit of radius r around a planet of mass m. express the orbital speed in terms of g, m, and r.

The scientist is investigating the cause of an unusual color in the lake water of a specific location

An object moves in the eastward direction at constant speed. A net force directed northward acts on the object for 5.0 s. At the end of the 5.0-second period, the net force drops to zero newtons.

A cue ball initially moving at 2.5 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball's final speed is 1.2 m/s at an angle of? With respect to its original line of motion.

What is potential energy?

Radio waves just like light waves can be reflected refracted and diffracted and polarized. True or False

In a laser, electrical energy is changed to light energy, and a small amount of the energy is wasted as heat. Describe the total amount of the heat in the system (using the conservation of energy).

What is the name for a star and planets held together by gravity? A. solar system B. galaxy C. black hole D. supernova

When a car turns a corner on a level road, which force provides the necessary centripetal acceleration? 1) gravity 2) normal force 3) air resistance 4) tension 5) friction

Use Newton's universal law of gravitation to explain why gravity is greater on Earth than on Mercury.

What is a magnetic field and how does it interact with magnetic materials?