What is the force needed to change an object's velocity from rest to 14 m/s in 5 s? The object's mass is 16 kg.

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

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.

Does heating a metal wire increase or decrease its electrical resistance? why?