The kinetic energy of the free electron at the point of collision is higher if the atom is closer to the source of electrons
A. True
B. False
The only way to emit IR photons is if there are empty electronic energy levels really close to the ground state (lowest energy level).
A. True
B. False
When atomic electrons are excited to a higher level, they always return to their lowest energy level by jumping down one level at a time.
A. True
B. False
Answers: 1
Physics, 21.06.2019 15:00
If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.
Answers: 2
Physics, 22.06.2019 00:30
Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?
Answers: 1
Physics, 22.06.2019 23:30
Aswimming pool whose volume is 10 comma 000 gal contains water that is 0.01% chlorine. starting at tequals0, city water containing 0.003% chlorine is pumped into the pool at a rate of 5 gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after 1 hour? when will the pool water be 0.006% chlorine?
Answers: 1
Physics, 23.06.2019 10:00
What happens to the electrostatic force between two charged particles if the distance between them is doubled?
Answers: 1
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