The idea that the universe began as a single point is a main premise in which of the following? a. redshifting b. the big bang theory c. the big crunch theory d. nucleosynthesis

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

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