1. A 2-kg object is moving in a uniform circular path with a radius of 5 m and a tangential velocity of 25 m/s.
a. What is the centripetal acceleration of the object?
b. What is the magnitude of the centripetal force acting on the object?
C. How long does it take for this object to travel around the circle once (in seconds)?

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?