. Take a stick of length one and denote it by the unit interval [0, 1]. Pick two i. i.d. Uniform(0, 1) random variables U and V and mark them on the stick. Break the stick at those two marks so that you get three broken pieces of the stick. Choose one these three pieces uniformly at random. Let L be the length of the chosen piece. What is the expected value of L

Power can be defined as a. the distance over which work was done. b. how much work can be done in a given time. c. all the work in an given area. d. the energy required to do work.

Which configuration would produce an electric current? a) rotate a coil of copper wire between two magnets. b) connect a wire between a copper and zinc strip sitting in a beaker of water. c) connect a wire to the (+) positive end of a battery and the other end to a light bulb. d) connect a wire to the negative end of a battery and the other end to a light bulb.

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?