Which statement best defines a motor unit? a. a motor nerve and the muscle cells it stimulates b. a nerve supplying a muscle originating from the spinal cord c. branches located in each individual muscle cell d. single nerves found in each muscle

An object's buoyant force and weight mean the same thing.a. trueb. false

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

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.