The Mohs scale is based on how many minerals?
a. 8
b. 10
c. 12
d. 15
b
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Mars has two moons that are most similar in character to
A) small asteroids. B) comets. C) Earth's Moon. D) particles in the rings of Saturn.
Which of the following best describes the findings of the Viking landers in the experiments they conducted to search for life on Mars?
A) Some experiments were potentially suggestive of life, but their results could also be explained by chemical reactions not associated with life. B) Absolutely no evidence indicating life was found in the Martian soil. C) The landers detected organic material and evidence for microbial organisms in the soil. D) The experiments failed to operate properly and therefore did not provide any results.
A pattern of dark lines on a continuous background is referred to as
A) an emission line spectrum B) an absorption line spectrum C) a continuous spectrum D) a dark spectrum
A 0.17 kg baseball is thrown with a speed of 38.m/s and it is hit straight back to the pitcher with a speed of 62.m/s. What is the magnitude of the IMPULSE exerted upon the ball by the bat?
What will be an ideal response?