Aball is thrown vertically upward from the top of a 100 foot tower, with an initial velocity of 10 ft/sec. its position function is s(t) = –16t2 + 10t + 100. what is its velocity in ft/sec when t = 2 seconds?

An electron is trapped at a defect in a crystal. the defect may be modeled as a one-dimensional, rigid-walled box of width 1.00 nm. (a) sketch the wavefunctions and probability densities for the n 1 and n 2 states. (b) for the n 1 state, nd the probability of nding the electron between x1 0.15 nm and x2 0.35 nm, where x 0 is the left side of the box. (c) repeat (b) for the n 2 state. (d) calculate the energies in electron volts of the n 1 and n 2 states