When an electron goes from a higher energy level back down to the ground state, what is the most accurate way to describe the light it emits? always a single photon, with less energy than the electron absorbed to move up to the higher level. the electron does not emit light but absorbs light. one or more photons, always with less total energy than the energy the electron absorbed to move up to the higher level. always a single photon, equal in energy to the energy the electron absorbed to move up to the higher level. one or more photons, equal in total energy to the energy the electron absorbed to move up to the higher level.

According to the phase diagram for water, how is the state of water determined? proceed up a vertical line at any given temperature read the phase at the intersection of any given temperature and pressure at a given pressure, proceed horizontally to the s-l or l-g line

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)