The loudness of a sound wave is most closely related to

A high pressure gas inflates a balloon, doing 103 joules of work. It happens quickly enough that any heat exchange is negligible.

Which of the following describes electric current? A. Electric current is the flow of protons B. Electric current is the flow of neutrons C. Electric current is the flow of a charge D. Electric current is the flow or protons and neutrons

A small metal ball hangs from the ceiling by an insulating thread. The ball is attracted to a positively charged rod held nearthe ball. The charge of the ball must be (a) positive. (b) negative. (c) neutral. (d) positive or neutral.

When 0.1523 g of liquid pentane (CH) combusts in a bomb calorimeter, the temperature rises from 23.7C to 29.8 C. What is U for the reaction in kJ/mol pentane? The heat capacity of the bomb calorimeter is 5.23 kJ/C.

The branch of mechanics dealing with the mathematical methods of describing motion is calle

A person of 83 kg is in an elevator. If the elevator is moving at a speed of 5 m/s, what's the person's kinetic energy? Keep 4 significant figures a 1,004 J b 1,038 c 1,280 J d 980 J e 1,435 J

What two equations can be used to determine the speed of a wave

Which force has an infinite range and is always attractive?

A ramp with a mechanical advantage of 8 lifts objects to a height of 1.5 meters how long is the ramp

Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?