A pair of sunglasses and a pair of clear reading glasses are left in the sunlight. The hotter glasses will be the
A) sunglasses.
B) reading glasses.
C) both of these
D) neither of these
Answer: A
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For a system in simple harmonic motion, which of the following is the number of cycles or vibrations per unit of time?
a. amplitude maximum b. period c. frequency d. wavelength
If n moles of an ideal gas are compressed isothermally from an initial volume V1 to a final volume V2, what is the change in entropy?
A.
B.
C.
D.
E.
Where was supernova 1987a located?
A) in the Orion Nebula, M-42 B) in Sagittarius, near the Galactic Nucleus C) in our companion galaxy, the Large Magellanic Cloud D) in M-13, one of the closest of the evolved globular clusters E) near the core of M-31, the Andromeda Galaxy
In making a transition from state n = 1 to state n = 2, the hydrogen atom must
A) absorb a photon of energy 10.2 eV. B) emit a photon of energy 10.2 eV. C) absorb a photon of energy 13.58 eV. D) emit a photon of energy 13.58 eV.