An empty hollow metal sphere has a potential of + 130 V with respect to ground (defined to be at V = 0) and has a charge of 1.8 10-9 C. Find the electric potential at the center of the sphere.

John traveled East at 10 m/s for ten seconds. He realized he had gone too far and made a U-turn. He traveled West at 5 m/s for six seconds. Calculate John's displacement. a. 30 m b. 70 m C. 100 m d. 130 m

If an element has 6 electrons, how many of them will be in the 2nd energy level? How many neutrons does element X have if its atomic number is 54 and its mass number is 163? If element X has 106 protons, how many electrons does it have?

How much work do you do when you lift a 15-kg box to a height of 5.0 m? 75 J 735 J 980 J 735 lb 147 N

A. Four equal particles with positive charge q = 14.418x10-19 C and mass m = 81.99x10-31 kg are initially held at the four corners of a square of side L = 0.07 m. What is the total electric potential at the center of the square? (in V) B.

A tree is 24 feet 8 inches tall. What is its height in meters?

A ping pong ball with a dent in it can be put into a pan of boiling water. After a short amount of time, the dent will pop out. Determine the best reason for this occurrence. A) The ping pong ball plastic heats up and expands.

What is the difference between heat temperature and thermal energy?

Which statement about subatomic particles is true? A. Protons, neutrons aND electrons all have about the same mass B. Unlike protons or neutrons, electrons have no mass C. Neutrons have no charge and no mass D.

You have a fish aquarium with the dimensions of 55cmx100cmx80cm. What volume of water should you put?

The thread around a screw is a lever.