The Stefan-Boltzmann law relates the ____
a. energy emitted from a surface every second to the temperature of the surface
b. wavelength of peak intensity to the Kelvin temperature
c. binding energy to the Coulomb force
d. difference in energy level to the wavelength of the emitted photon
e. observed wavelength to the velocity of the object
a
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Thin Films: When a light wave enters into a medium of different refractive index,
A. only its speed and frequency change. B. only its speed and wavelength change. C. only its frequency and wavelength change. D. its speed, frequency, and wavelength change.
To calculate an object’s heat capacity, we take its specific heat and
A. multiply by the object’s mass M. B. divide by the object’s mass M. C. multiply by the molar mass MA of the object’s molecules. D. divide by the molar mass MA of the object’s molecules. E. multiply by the mass m of one molecule in the object. F. divide by the mass m of one molecule in the object. T. do something else (specify).
Nearsighted people wear glasses with
lenses that are designed to a) make the image larger. b) improve the focus of the image. c) make the image smaller. d) make the image brighter.
If F = 4.0 N and m = 2.0 kg, what is the magnitude a of the acceleration for the block shown below? The surface is frictionless
a.
5.3 m/s2
b.
4.4 m/s2
c.
3.5 m/s2
d.
6.2 m/s2
e.
8.4 m/s2