Lilies in a certain pond double their total lake area covered every week. One day you notice that the pond is 1/8 covered with lilies. How long will it be before the pond is totally covered with lilies?
A) 3 weeks
B) 8 weeks
C) 6 weeks
D) 4 weeks
E) It is impossible to answer this without knowing the total area of the pond.
A
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Tidal forces are very important to the Algol system today, but were not important when both stars were still on the main sequence. Why not?
A) Main-sequence stars in a system like the Algol system are small compared to their physical separation. B) Main-sequence stars are too big to be affected by tidal forces. C) Main-sequence stars are too massive to be affected by tidal forces. D) Main-sequence stars are unaffected by tidally-induced mass transfer.
The most modern definition of element is
a. a substance that cannot be further separated by chemical methods. b. the simplest form of matter. c. a substance in which all the atoms have the same number of protons. d. a substance that contains no neutrons.
A weight lifter can bench press How many milligrams (mg) is this?
A) 1.71 × 108 mg B) 1.71 × 109 mg C) 1.71 × 107 mg D) 1.71 × 106 mg
The center of our galaxy lies in the direction of the constellation of
a. Ursa Minor. b. Ursa Major. c. Sagittarius. d. Orion. e. Monoceros.