For a system in simple harmonic motion, which of the following is the time required to complete a cycle of motion?
a. amplitude maximum
b. period
c. frequency
d. wavelength
Ans: b. period
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The point along a planet's orbit where it is closest to the Sun is called the orbit's
A) period. B) perihelion. C) eccentricity. D) semi-major axis. E) aphelion.
The exclusion principle applies to what kind of particles?
A) all fermions, but not bosons B) all bosons, but not fermions C) only leptons, but not other fermions D) both fermions and bosons E) only exchange bosons
A main sequence star has 3 times the mass of the Sun. Using ________ we find that the star is ________ times more luminous than the Sun.
A. the Stefan-Boltzmann law; 3 B. the inverse-square law; 9 C. the mass-luminosity relation; 3 D. Wien's law; 3 E. the mass-luminosity relation; 9
An energy of 13.6 eV is needed to remove an electron from the n = 3 state of a lithium atom. If a single photon accomplishes this task, what wavelength is needed? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.6 × 10^?19 J, and 1 nm = 10?9 m)
a. 146.3 nm b. 30.5 nm c. 13.8 nm d. 91.4 nm e. 234 nm