What kind of thermal radiation does the Earth emit?
A) infrared light
B) infrared, visible, and ultraviolet light
C) infrared and visible light
D) visible and ultraviolet light
E) visible light
A
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Compound Microscope: For relaxed viewing with a microscope or a telescope, the eyepiece is adjusted to place the image at
A. the near point of the eye. B. the pupil of the eye. C. the focal point of the eyepiece. D. infinity. E. the focal point of the objective lens.
Astrobiology as a field of scientific research, includes contributions from
A) only astronomers and biologists B) biologists with an interest in astronomy C) astronomers with an interest in biology D) many different scientific disciplines
The center of the Milky Way lies in the direction of the constellation
A) Cygnus. B) Orion. C) Andromeda. D) Sagittarius. E) Virgo.
A physicist claims that she has found a new particle with a mass 200 000 times the mass of the proton (1.67 × 10^-27 kg) and a charge of 3.20 × 10^-19 C. If she is correct, such a particle traveling in a circle in a uniform 5.00 T magnetic field at a velocity of 2 500 m/s will have a radius of
a. 0.261 m. b. 0.522 m. c. 1.04 m. d. 3.27 m. e. 3.13 × 10^26 m.