A solid metal sphere of radius r is inside a metal concentric spherical shell of inner radius 2r and outer radius 3r. A charge is place on the
solid metal sphere and it is found that the potential at its surface is V1 (at r) and that the potential at the outer surface of the spherical
shell is Va (at 3r). In terms of V1 and V3, what is the potential at the inner surface of the metal shell (at 2r)?
A. 3V1/2 B. V3 C. V1 D. 2V3/2

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?

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

Which of the following is another term for a planned economy