Consider two electrons in a one-dimensional box of length l. the potential energy is zero inside the box and infinite outside of it. the potential energy of the electron-electron interaction is v(x_1, x_2). a) first, assume that v(x_1, x_2) = 0. find the ground state energy and write down the ground state wave function considering spatial and spin state symmetry. b)now v(x_1, x_2) = l v_0 delta (x_2 - x_1). assuming that v_0 is small find the correction to the ground state energy.

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

Which of the following is an example of motion in two dimensions?