subject
Physics, 04.08.2019 00:00 KpopSushi

As mentioned in this week’s notes on page 4, the electrons of an atom can occupy different energy shells within the atom (similar to how the planets all occupy different orbits around the sun). electrons prefer to be in the lowest energy shell possible (the ground state); however, they can gain energy and jump to a higher shell by absorbing light or being excited by an electric current. in accordance with the conservation of energy, if an electron drops from a higher energy level to a lower one, this must emit a photon (particle of light) with energy equal to the energy difference of the shells. a balmer series transition is any transition of an electron from some higher energy shell down to the second lowest energy shell (n=2) in hydrogen. looking at image (b) above, what is the wavelength of a photon emitted during the balmer transition from the n=3 shell in hydrogen? (remember nm is short for a nanometer, for example 656 nm = 656 x 10-9 meters) 656e-9 meters 486e-9 meters 434e-9 meters 410e-9 meters

ansver
Answers: 2

Another question on Physics

question
Physics, 21.06.2019 23:00
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
Answers: 1
question
Physics, 23.06.2019 02:00
Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.
Answers: 3
question
Physics, 23.06.2019 06:30
What surface does the epithelial tissue cover? a. the surface of the body b. lines internal organs c. forms many glands d. all of the above
Answers: 3
question
Physics, 23.06.2019 12:30
Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question
Answers: 3
You know the right answer?
As mentioned in this week’s notes on page 4, the electrons of an atom can occupy different energy sh...
Questions
question
History, 28.01.2020 23:58
question
Social Studies, 28.01.2020 23:59
question
English, 28.01.2020 23:59