An excited atom can lose energy by

a. emitting a photon.
b. absorbing a photon.
c. undergoing the photoelectric effect.
d. increasing its de Broglie wavelength.
e. the uncertainty principle.


a

Physics & Space Science

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Self-interstitials are produced when metals are _____________ deformed.

Fill in the blank(s) with the appropriate word(s).

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The lobes of a radio galaxy can be as much as:

A) dozens of light years from the galaxy's nucleus. B) hundreds of light years from the galaxy's nucleus. C) thousands of light years from the galaxy's nucleus. D) millions of light years from the galaxy's nucleus. E) billions of light years from the galaxy's nucleus.

Physics & Space Science

The symbol notation now used for elements was developed by

a. Dalton. b. Berzelius. c. Rutherford. d. Bohr.

Physics & Space Science

At the moment of a total eclipse, the moon lies along a line from the Earth to the sun. If your normal weight is 600 N, how much is your weight decreased by the combined pull of the sun and moon? MSUN = 2.0 × 10^30 kg, rS-E = 1.5 × 10^8 km MMOON = 7.4 × 10^22 kg, rM-E = 3.8 × 10^5 km

Physics & Space Science