Afirefighter directs a stream of water travelling at 35.0 m/s from a fire hose at angle of 32.0° above the horizontal towards a building. the end of the hose is 1.00 m above the level ground. the water hits the building at a height of 17.6 m from the ground as shown in the diagram below. assuming that there is negligible air resistance and that the water is projectile, determine how far the firefighter is from the base of the building.

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