A 10.0 kg box is placed on an inclined plane that makes an angle of 30.0o relative to the horizontal.

a. What is the force due to friction necessary to keep the box stationary?
b. What is the static coefficient of friction necessary to keep the box stationary?

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

What is a good example of instantaneous speed

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?