If a beam of light enters one medium from another medium, what quantity does not change?

A - Direction

B - Speed

C - Wavelength

D - Frequency

A baseball with a mass of 0.15 kilograms collides with a bat at a speed of 40 meters/second. The duration of the collision is 8.0 * 10-3 seconds. The ball moves off with a speed of 50 meters/second in the opposite direction.

Iron can rust when it is exposed to oxygen. What method could be used to prevent iron from rusting?

What is the mass of an object that has a 250 N force moving at an acceleration of 10 m/s2?

describe what types of climates are found at both the equator and 30O latitudes. What is air doing in those regions?

Two small spheres with charges of 2.5 nC and the other 5.1 nC are sparated by a distance of 1.1 m. What is the electric potential between the two spheres?

Analyze what happens to the air pressure as you increase in the altitude. How might this affect athletes who compete at higher altitudes?

Some windows are made with a single pane of glass. Other windows are made out of two panes that have a tiny pocket of air trapped between them.

Katrina inserts a key into her car ignition she turns the key putting her car into ignition mode. In thos mode energy is used to increase the temperature of the cars fuel this energy allows fuel to combust and the car to move.

Monochromatic light passes through two parallel narrow slits and forms an interference pattern on a screen. As the distance between the two slits is decreased, the distance between light bands in the pattern on the screen will a. decrease. b.

The voltage in a battery is 9 volts. The resistance is 3 ohms. What is the current?