Which action demonstrates increasing the resistance of a movement by lengthening the distance between the join and movement? a. doing a sit up with arms on the forehead after sitting up with arms behind head b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle c. rising from a wide-leg squat after rising from a closed leg squat

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