A large iron sphere was placed a certain from a huge boulder. The force of gravity felt by the sphere from the boulder is 0.2N. The mass of the boulder is doubled and the distance is doubled. Which statement is correct?

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

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.

Why does gravity have a lesser than grater effect on higher altitudes?