The 200 lbcrate is being moved by a rope that passes over a smooth pulley. The floor is rough and μs= 0.30. Determine the value of hfor which impending motion by slipping and tipping would occur simultaneously.

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.

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.