An element that tends to gain electrons during chemical reactions is probably
a. a semimetal.
b. a nonmetal.
c. an actinide.
d. a metal.
b
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According to the nebular theory of solar system formation, which law best explains why the solar nebula spun faster as it shrank in size?
A) the law of conservation of angular momentum B) the law of conservation of energy C) the law of universal gravitation D) Einstein's law E = mc2
A sonic boom occurs only as an airplane just reaches the speed of sound in air, but not after it increases its speed further
A) True B) False
Material that is transported and deposited by ice is called ______________
Fill in the blank(s) with correct word
Angular Momentum: A 5.0-m radius playground merry-go-round with a moment of inertia of 2000 kg ? m2 is rotating freely with an angular speed of 1.0 rad/s. Two people, each of mass 60 kg, are standing right outside the edge of the merry-go-round and suddenly step onto the edge with negligible speed relative to the ground. What is the angular speed of the merry-go-round right after the two people have stepped on?
A. 0.20 rad/s B. 0.40 rad/s C. 0.60 rad/s D. 0.80 rad/s E. 0.67 rad/s