The study of energy levels in atoms is called

A) special relativity.
B) general relativity.
C) quantum mechanics.
D) classical mechanics.
E) particle physics.


C

Physics & Space Science

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Which best describes the transit method?

a. observing changes in the brightness of the star when the orbiting planet crosses in front of the star b. observing the magnification of a distant star's brightness by gravitational lensing when an extrasolar planet passes precisely between Earth and a background star c. observing the back-and-forth motion that can be measured from Doppler shifts in a star's spectrum d. observing the intensity of brightness from a newborn distant star e. observing the magnification of a distant planet when it passes closely to our Solar System

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The constant K in Kepler's Third Law is the same for all the planets in our solar system, but is different for planetary systems orbiting other stars

Indicate whether the statement is true or false

Physics & Space Science

In the searches so far, only about 1 in 10 stars show evidence for planets around them

Indicate whether the statement is true or false

Physics & Space Science

What do "kiloton" and "megaton" refer to?

a. explosive yields of nuclear weapons b. kiloton means 1000 tons of TNT c. megaton means one million tons of TNT d. all of the above

Physics & Space Science