According to the solar nebula theory, dust grains, whatever their composition, grew from microscopic size first by condensation, then by accretion
Indicate whether the statement is true or false
True
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A pendulum is made with a 4.00 kg mass suspended at the end of a thin rod. The period of the small motion simple harmonic motion is 1.00 sec. What is the length of the thin rod?
A. 24.8 cm B. 29.7 cm C. 31.4 cm D. 34.1 cm E. 36.2 cm
What do we mean by time dilation in relativity?
A) It is the idea that time really runs slower in reference frames moving relative to you. B) It is the idea that time seems to run slower in reference frames moving relative to you, but time really is the same for everyone. C) It is the idea that relativity makes time dilate, or expand, for people who study it. D) It is a hallucinogenic effect experienced by people who take too much of something.
The phase of matter in the Sun is
A) gas. B) plasma. C) liquid. D) solid. E) a mixture of all of the above
Electrons are
a. positively charged. b. negatively charged. c. uncharged. d. variably charged.