The most abundant element in the universe
A) hydrogen.
B) helium.
C) lead.
D) uranium.
Answer: A
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In the development of a terrestrial planet, the stage of ____ when dense material settled to the core and less dense to the outer parts
a. differentiation b. cratering c. glaciation d. accretion e. flooding
Alternating current is normally produced by a
A) battery. B) generator. C) both of these D) neither of these
A stone is thrown at an angle of 30° above the horizontal from the top edge of a cliff with an initial speed of 14 m/s. A stop watch measures the stone's trajectory time from top of cliff to bottom to be 7.1 s. What is the height of the cliff? Note: g = 9.8 m/s2 and air resistance is negligible
a. 58 m c. 120 m b. 114 m d. 197 m
Which of the following nuclei is not "doubly magic"?
A. 16O B. 40Ca C. 48Ca D. 122Sn E. 208Pb