A nearsighted person has a far point that is 4.2 m from his eyes. What focal length lenses must he use in his contact lenses to allow him to focus on very distant mountains?
A) -4.8 m B) -5.2 m C) 4.2 m D) -4.2 m E) 5.2 m
D
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The distance between two massive objects quadruples. By what factor has the gravitational force between them changed?
A) one eighth B) one sixteenth C) one fourth D) one half E) one third
If a star appears to move relative to other stars over a one-year period, this motion is due to the star's:
A) transverse motion. B) radial motion. C) parallax shift. D) Doppler shift. E) true space motion.
When atoms of two elements with a medium difference in electronegativity bond together, the bonding is probably
a. ionic. b. covalent. c. polar covalent. d. metallic.
The amount of reserves of oil in a given formation is determined at the beginning of exploitation of a resource and never changes much thereafter
What will be an ideal response?