A 2.1w iPod is used for 30 mins. How much energy is used?

What are the different types of forces and how do they act on objects

Natalia is studying a wave produced in her magnetics lab. This wave can move through the empty space in a vacuum and carries a lot of energy.

A small glass bead has been charged to + 30.0 nC. A small metal ball bearing 2.60 cm above the bead feels a 1.80*10-2 N downward electric force. Part A What is the charge on the ball bearing? Express your answer with the appropriate units.

The unit for measuring electric power is the a. ampere. b. ohm. c. volt. d. watt.

Explain why is it easy to slip on a floor that is wet

Two very small spheres are initially neutral and separated by a distance of 0.30 m. Suppose that 2.50 1013 electrons are removed from one sphere and placed on the other. (a) What is the magnitude of the electrostatic force that acts on each sphere?

Why is it important to balance a chemical equation? A. It is not important to balance a chemical equal B. To make sure you have the correct products C. To make sure you have the correct reactants D. To obey the law of conservation of mass

The presence of icicles hanging off the eaves of a wood-framed structure is most likely due to: heavy snow followed by a thaw. improper insulation in wall cavities. use of a poor-quality roof sheathing material. lack of proper roof ventilation.

Both gravitational potential energy and kinetic energy depend on

How much work is done when a 105 g tomato is lifted 19.2 m?