What is energy used in our homes to produce stereo sound through speakers

Why do black holes happen?

A small hot-air balloon is filled with 1.02*106 l of air (d = 1.20 g/l). as the air in the balloon is heated, it expands to 1.09*106 l. what is the density of the heated air in the balloon?

The sunlight hits the surface of a lake this will like caused a. condensation b. transpiration c. evaporation d. sublimation

How could a person easily tell which envelope contained four sheets of paper and which contained five sheets without opening the envelopes what assumption did you make in arriving at your answers

Which statement is TRUE? A) In a series circuit, the resistors do not share the current. B) In a series circuit, as light bulbs are added, the bulbs dim. C) In a series circuit, if one bulb goes out the other bulbs will stay lit.

How can we describe an atom

What is the volume of a gold nugget that weight 2.20kg. the density of gold is 19g/cm^3 ... ?

Explain how newton's first law of motion can be considered to be a consequence of newton's second law.

Propose a hypothesis for how the position of the ball will affect the amount of its gravitational pull energy

A water-skier is pulled behind a boat by a rope that is at an angle of 13° and has a tension of 490 N. The water-skier has a mass of 49 kg. Draw a free-body diagram showing the forces acting on the skier. (She is being pulled to the right.)