How can an electron in an atom lose energy to go from a higher energy level to a lower energy level?
A) It absorbs a photon equal in energy to its own energy drop.
B) It loses kinetic energy.
C) It loses gravitational potential energy.
D) It releases a photon equal in energy to its own energy drop.
E) It exchanges gravitational potential energy for kinetic energy.
D
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Time Dilation: Suppose one twin takes a ride in a spaceship traveling at a very high speed to a distant star and then back again, while the other twin remains on Earth. Compared to the twin who remained on Earth, the astronaut twin is
A. younger than the Earth-twin. B. the same age as the Earth-twin. C. older than the Earth-twin. D. The ages cannot be determined from the information provided.
You can safely stand on the overhanging end of a heavy plank that rests on a table. How much overhang depends on your mass and the plank's mass
If you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its total length, how massive is the plank compared to your mass? A) 1/2 B) the same C) 1 and 1/2 times D) twice E) 4 times
Seismic waves that travel through Earth are called ______________ waves
Fill in the blank(s) with correct word
You have exactly 4 resistors: one 3 ?, one 4 ?, one 5 ?, and one 6 ?. How can you combine these to make a 2 ? resistor? (The symbol ? stands for "ohm.")
A. Connect the 3 ? resistor in series with the 5 ? resistor B. Connect the 3 ? resistor in parallel with the 6 ? resistor C. Connect all four resistors in parallel with each other D. Connect the 3 ? resistor in parallel with the 4 ? resistor E. You can't make a 2 ? resistor from the choices listed