The electric field that is 0.25m from a small sphere is 450n/c toward the sphere.

a. Is the charge positive or negative? Why?

b. What is the magnitude of the charge on the sphere?

an 114 g mass is dropped from rest at a height of 64.1 cm above a spring of negligible mass. The mass then compresses the spring to a maximum displacement of 4.1081 cm. What is the spring force constant k of the spring

A stone is dropped from the top of a tower of height 44.1m. How long will it take to reach the ground?

A 1.5 kg ball pushed with a force of 13.5 N accelerates to the left. What is the acceleration of the ball?

The rate at which work is done is

A circuit maintains a constant resistance. If the current in the circuit is doubled, what is the effect on the power dissipated by the circuit?

When distances were carefully measured from Earth to globular clusters above and below the Milky Way plane (where our view of them is not obscured by interstellar dust and gas), their distribution was found to be

Imagine you transfer heat into a gas. This heat splits up in two different ways: Additional thermal energy making the gas hotter and "fuel" for the gas to do work. Let's suppose, 64% of the transferred heat transforms into thermal energy.

How much heat is absorbed by a 61g iron skillet when its temperature rises from 5oC to 29oC?

Explain the relationship between motion and frame of reference.

Two students are looking at a brightly lit full Moon, illuminated by the reflected light from the Sun. Consider thefollowing discussion between the two students about what the spectrum of moonlight would look like.