As the Sun evolves into a red giant in the distant future, then according to Wien's Law:
A) most of its energy must become shorter in wavelength.
B) its peak on the Planck curve will move into the infrared.
C) its total luminosity must decrease.
D) it will disappear from the universe of visible light.
E) its light will be slowed down by its increasing mass.
B
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The secondary of a transformer is the coil connected to
A) the load. B) the Internet. C) the input power line. D) none of the above
Two uniform solid spheres have the same mass, but one has twice the radius of the other. The ratio of the larger sphere's moment of inertia about a central axis to that of the smaller sphere is
A) 4/5. B) 8/5. C) 1/2. D) 2. E) 4.
Jack pulls a sled across a level field by exerting a force of 120.0 N at an angle of 30.0° with the ground. What are the parallel and perpendicular components, respectively, of this force with respect to the ground?
a. 208 N, 120 N b. 120 N, 208 N c. 104 N, 60 N d. 60 N, 104 N e. 69 N, 208 N
The sign of the charge carriers in a current can be determined using the
A) Hall effect. B) drift velocity. C) oil drop experiment. D) mass spectrometer. E) not given