Mason lifts a box off the ground and places it in a car that is 0.50 meters high. If he applies a force of 80 newtons to lift this suitcase, what is the

work done?

A.

B.

O joules

4.0 joules

C. 4.0 x 102 joules

D. 4.0 * 102 joules

Why can parallax only be used to measure distances to stars that are relatively close to earth?

Three charges are located along x-axis with first + 5C charge at origin, second - 1C charge 2m to the right of orgin and the third + 2C charge 3m to the right of orgin.

A reporter once described a light-year as ""the time it takes light to reach us traveling at the speed of light."" How would you correct this statement?

The force on a negative charge is in the opposite direction of the electric field. a. True b. False

One beam of electrons moves at right angles to a magnetic field. the force on these electrons is 4.9 x 10-14 newtons. a second beam travels at the same speed, but at a 30° angle with the magnetic field. what force is on these electrons?

An object traveling at a 5.0 m/s east has a mass of 4.0 kg. what is the magnitude of the object's momentum?

Object A and B are 10m apart. Which of the following will cause the greatest increase in gravitational force between the objects? A. Increase the mass of object A. B. Increase the mass of object B. C. Increase the distance between objects A and B. D.

A large balloon is initially filled to a volume of 1.96 l at 318.44 k and a pressure of 2.89 atm. what volume of gas will the balloon contain at 1.77 atm and 336.33 k?

What would scorch marks on fabric near bullet wound indicate?

The heat added to a thermodynamic system minus the work done is equal to which of the following? A. the heat lost from the system B. the internal energy C. the total heat added to the system D. the Carnot efficiency of the system E.