Ablock with mass m= 6.7 is hung from a vertical spring. when the mass hangs in equilibrium, the spring stretches x = 0.29m. while at the equilibrium position, the mass is then given an initial push it downword and v 4.6 m/s. the block oscillates on the spring without friction.
1)what is the spring constant of the spring? 2)what is the oscillation frequency? 3)after t = 0.42 s what is the speed of the block? 4)what is the magnitude of the maximum acceleration of the block? 5)at t = 0.42 s what is the magnitude of the net force on the block?

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.

Abeam of light shining from water to air strikes the surface at an angle greater than 48 degrees and produces total internal reflection. if the incident beam is at a 50 degree angle what angle is the reflected beam 13 25 50 100

What are two examples of phase changes that skip a phase during transition?