In the atmosphere, the shortest wavelength electromagnetic waves are called
a. microwaves.
b. infrared waves.
c. ultraviolet waves.
d. X-rays.
e. gamma rays.
E
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Camera Exposure: If a camera lens aperture is set to f/4, then
A. the radius of the lens aperture is ¼ the focal length. B. the focal length of the lens is 4 mm. C. the diameter of the lens aperture is ¼ the focal length. D. the radius of the lens aperture is 4 times its focal length. E. the diameter of the lens aperture is 4 times its focal length.
The specific gravity of an unknown liquid is known to be 1.26. The liquid is most likely:
(A) Glycerin (B) Carbon tetrachloride (C) Mercury (D) Water
Most of the matter in the universe is in the
A) solid phase. B) liquid phase. C) gaseous phase. D) plasma phase. E) none of the above
Tycho used his high accuracy observations to conclude that the Earth revolves around the sun
Indicate whether the statement is true or false