The discovery of any kind of life beyond the Earth would
A) cause a profound change in perspective of the whole of humanity
B) be of interest to all scientists, but of little interest to the wider public
C) be of no interest to anyone at all
D) only be on interest to biologists
A
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When the equation Al + O2? Al2O3 is balanced, the coefficient of Al2O3 is
a. 1 b. 2 c. 3 d. 4
Identical forces act for the same length of time on two different objects. The magnitude of the change in momentum of the lighter object is
A) smaller than the magnitude of the change in momentum of the larger mass, but not zero. B) zero. C) exactly equal to the magnitude of the change in momentum of the larger mass. D) larger than the magnitude of the change in momentum of the larger mass. E) There is not enough information to answer the question.
The pitch of a sound is determined by the frequency; the higher the frequency, the higher the pitch
Indicate whether the statement is true or false
The galactic halo or corona is believed to contain mostly
a. O and B stars. b. G, K, and M stars. c. open clusters d. globular clusters e. dark matter.