Review interactive solution 4.47 in preparation for this problem. a 88.8-kg baseball player slides into second base. the coefficient of kinetic friction between the player and the ground is μk = 0.531. (a) what is the magnitude of the frictional force? (b) if the player comes to rest after 1.38 s, what is his initial speed?

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

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?