A conducting spherical shell of inner radius r1 and outer radius r2 has a charge Q on it. An additional charge, also Q, is then added to the sphere. What is the resulting charge per unit area on the outer surface of the sphere?

The gravitational force of attraction between Earth and the Sun is 3.52 x 1022 newtons. Calculate the mass of the Sun. [Show all work, including the equation and substitution with units.]

wnat happens to the sound intensity level (expressed in dB) if we doubled the intensity of the voice of a specific sound?

Which formula is used to calculate the mass of an object if the force and acceleration are known? m = Fa m = m = m = F - a

Which two statements are true about a system? A system is a group of objects analyzed as one unit. Energy that moves across system boundaries is conserved. There's only one way to define the boundaries of a system. All systems are made by humans.

A box at rest on a ramp is in equilibrium, as shown. What is the force of static friction acting on the box? Round your answer to the nearest whole number.

Cody's car accelerates from 0m/s to 45 m/s northward in 15 seconds. What is the acceleration of the car?

Which of the following best illustrates chemical potential energy a dog Plane, gasoline gasoline, water moving down hill, a skydiver about to jump out of a plane

What are two ways to increase the acceleration of an object?

On the moon, all free-fall distance functions are of the form s (t) = 0.81t^2 where t is in seconds and s is in meters. An object is dropped from a height of 200 meters above the moon. After 9 sec, consider parts (a) through (d) below.

Why fan rotates in a clockwise direction and why not in a anti clockwise direction