A student standing in an elevator at rest notices that her pendulum has a frequency of oscillation of 0.5 Hz. a. what is the length of the pendulum's string?
b. the elevator starts to accelerate upwards. what effect will this have on the oscillation? explain. ​

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

The mantle is made up of which structural zones?

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction.true or false?