Dark matter may explain
a. unexpected orbital velocities of stars in galaxies
b. the so...
Physics, 29.10.2019 00:31 justritegrl
Dark matter may explain
a. unexpected orbital velocities of stars in galaxies
b. the source of energy that fuels stars
c. the expansion of the universe
d. the origin of life
e. what came before the big bang
Answers: 3
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Which of the following is a true statement about the acceleration ~a of the pendulum bob ~a is equal to the acceleration due to gravity. ~a is perpendicular to the bob’s trajectory. ~a is equal to the instantaneous rate of change in velocity. ~a is tangent to the bob’s trajectory.
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The smallest particle of an element that retains its identity in a chemical reaction. true or false
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