What is true of both gravity and magnetism?

Both are dependent on mass.

Both forces can act without objects touching.

Both forces are directly proportional to the distance between the objects.

Neither is a fundamental force of nature.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

This is the number of complete movements of a wave per second.

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.