15. Describe how the speed of sound would change as it first travels through a

Solid:

Liquid:

Gas:

(2pts)

The discovery and characterization of cathode rays was important in the development of the atomic theory because

A backpack weighs 8.2 newtons and has a mass of 5kg on the moon. What is the strength of the gravity on the moon?

What is the velocity of a car that travels 100 meters north in for seconds

On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 kg/m3, length 81.5 cm and diameter 2.55 cm from a storage room to a machinist. calculate the weight of the rod, w. the acceleration due to gravity, g = 9.81 m/s2.

An elevator of mass 3000 kg is ascending at a steady speed of 2.0 m/s. What is the force in the cable supporting the elevator?

Jessica took a Mylar balloon outside on a very hot day. As she waited for the bus the balloon began to get bigger. What is the best explanation of this?

Describe how electricity flows through a simple closed circuit.

Solar energy is produced by A. fusion of light nuclei to make heavier ones B. the slow release of heat left over from the Sun's formation C. fission of heavy nuclei into lighter ones D. solar magnetism

A 72-kg fisherman in a 114-kg boat throws a package of mass m = 15 kg horizontally toward the right with a speed of vi = 5.0 m/s.

Roberto creates an animation titled "Flying through an Atom." The animation makes it seem as if the viewer passes all the way through an atom, starting from one side, then through the atom's center, and then leaving through the other side.