John walks 1.00 km north, then turns right and walks 1.00 km east. his speed is 1.50 m/s during the entire stroll. a) what is the magnitude of his displacement, from beginning to end? b) if jane starts at the same time and place as john, but walks in a straight line to the endpoint of john's stroll, at what speed should she walk to arrive at the endpoint just when john does?

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Question 1 (5 pts): what is the maximum distance for which you can you resolve the two individual headlights of an on-coming truck as two separate lights rather than one if the headlights are separated by 2.00 m and your eye has a diameter of 1.00 centimeter? assume a wavelength of 500 nm.

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?