The mass of the asteroid is 9000 kg, and it is
approaching Earth at 45 m/s. If the rocket has a mass of 1800 kg, what
velocity must it have to completely stop the asteroid after collision?
A. - 225 m/s
B. 306 m/s
c. 45 m/s
D. - 116 m/s

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

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.