The earliest earth-centered theory was proposed by
Brahe
Copernicus
Galileo
Kepler
Ptolemy

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s. part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

When you hold a rectangular object, how does the area of the side that is resting on your hand affect the pressure and the force that the object exerts?