At temperatures of ________ K, photons can split apart nuclei until only protons and neutrons are left in photodisintegration
A) ten million
B) 100 million
C) one billion
D) ten billion
E) one hundred billion
D
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The lunar maria are ancient _______________ that have apparently covered older, cratered lowlands
Fill in the blank(s) with correct word
Buoyancy: An object weighs 7.84 N when it is in air and 6.86 N when it is immersed in water of density 1000 kg/m3. What is the density of the object?
A. 6000 kg/m3 B. 7000 kg/m3 C. 8000 kg/m3 D. 9000 kg/m3
Suppose there were no solar wind. How would the appearance of a comet in our inner solar system be different?
A) It would have only one tail instead of two. B) It would not have a coma. C) It would not have a nucleus. D) It would be much brighter in appearance.
A vertical vector of 3 units combined with a horizontal vector of 4 units has a resultant of
A) 1 unit. B) 5 units. C) 7 units.