A balloon is rubbed with a wool glove. The two items attract one another with a force of strength 1.2 N when they are 1 cm apart. If they have equal but opposite charges, what is the magnitude of the charge?

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

Explain why you think this diagram shows what happened to the carbon in the biodome.

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.