Consider an electron that is confined in a 1D box with L = 2.0 nm. What is the wavelength of the emitted photon when the electron makes a transition from n = 8 to n = 7?

Aswimmer is determined to cross a river that flows due south with a strong current. initially, the swimmer is on the west bank desiring to reach a camp directly across the river on the opposite bank. in which direction shoud the swimmer head? a. the swimmer should swim southeast. b. the swimmer should swim south. c. the swimmer shuold swim northeast. d. the swimmer should swim due north. e. the swimmer should swim due east.

Are good conductors of heat also good conductors of electricity? explain your answer.

Which of these are physical changes in matter? check all that apply. boiling water a pencil being sharpened exploding dynamite freezing water rotting cheese