Two blocks are connected by a massless rope that passes over a 2 kg pulley with a radius of 5 cm. The rope moves over the pulley without slipping. The mass of block A is 2 kg and the mass of block B is 3 kg. Block A is also connected to a horizontally-mounted spring with a spring constant of 150 J/m2. What is the period (in s) of simple harmonic oscillations of this system?

Calculate the ratio of h+ ions to oh– ions at a ph = 6. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 6. are they the same? why or why not? record your explanation in table a. what is the concentration of h+ ions at a ph = 6? mol/l what is the concentration of oh– ions at a ph = 6? mol/l what is the ratio of h+ ions to oh– ions at a ph = 6? : 1

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

What is the coefficient of kinetic friction μk between the block and the tabletop?