An atom can be excited into a higher energy state by
a. emitting a photon.
b. absorbing a photon.
c. undergoing the photoelectric effect.
d. decreasing its de Broglie wavelength.
e. the uncertainty principle.
b
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The length and width of a standard sheet of paper is measured, and then the area is found by calculation to be 91.50 in2. The number of significant figures in the width measurement must be at least:
a. 5 b. 6 c. 8 d. 4
The darker-colored bands in Jupiter's atmosphere are called ________.
A. belts B. cells C. zones D. gaps E. layers
A solid sphere, a solid cylinder, and a hoop each have the same mass and radius. If they are spinning at the same angular velocity, which one has the greatest angular momentum?
a. the sphere b. the cylinder c. the hoop d. They all have the same angular momentum.
Fast-moving electrons, moving close to c, in a strong magnetic field generate ________ radiation
Fill in the blank(s) with correct word