During refraction, what happens to a wave when it travels from one medium to another?

The wave travels in the opposite direction.

The wave changes speed.

The wave moves in the same direction.

The wavelength increases.

When astronomers observe the spectra of distant galaxies, they notice that the hydrogen emission lines are shifted noticeably toward the red end of the visual spectrum, a phenomenon called red shift. Red is lowest frequency of visible light.

Two + 1C charges are separated by 3000m. What is the magnitude of the electric force between them?

A coil is connected to a 100v d. c. supply and takes a current of 10A. Calculate the value of the resistance of the coil

What is the mass of an object if it accelerates at a rate of 2.5 m/s2 when a net force 50 N? a. 20 kg c. 10 kg b. 2 kg d. 75 kg het = ma TT 11 All ina na malato clom tonfite acelerationis

1. A psychologist exposes several lab animals to an enriched environment (toys to play with) and then compares their ability to run mazes to that of control animals. a). Hypothesis: b). Independent variable: c). Dependent variable:

Which structure connects muscles to bone?

A firefighter mounts the nozzle of his fire hose a distance 36.9 m away from the edge of a burning building so that it sprays from ground level at a 45° angle above the horizontal. After quenching a hotspot at a height of 8.

A force is applied to a 13.0 kg wagon to pull it down the sidewalk at a constant speed. The coefficient of kinetic friction is 0.65. Considering the resulting frictional force, what is the magnitude of the applied force?

What field (s) does a moving electron have? A. electric and gravitational fields B. magnetic and gravitational fields C. gravitational, electric, and magnetic fields D. electric field only

Copper has a specific heat of 0.385 j. A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100 Celsius to 200 degrees Celsius. What is the mass of the piece of copper?