Aforce has to have what two factors? magnitude and velocity. velocity and acceleration. magnitude and direction. size and speed.

What happens to light waves from a star as the star moves away from earth?

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Aphase diagram assumes is kept constant.