Physics, 16.01.2021 01:10 webbskyler
What led astronomers to believe in the existence of dark matter?
A. the fact that space is black
B. the big bang theory
C. the apparent effects of the gravity of unseen matter on visible objects
D. the existence of black holes
Answers: 1
Physics, 22.06.2019 13:20
Arrange the images in order to show how lake-effect snow occurs.
Answers: 2
Physics, 23.06.2019 03:30
First to answer will be the brainliest i need the answer asap
Answers: 1
Physics, 23.06.2019 14:30
Atruck going 15 kmôź°€h has a head-on collision with a small car going 30 kmôź°€h. which statement best describes the situation? (a) the truck has the greater change of momentum because it has the greater mass. (b) the car has the greater change of momentum because it has the greater speed. (c) neither the car nor the truck changes its momentum in the collision because momentum is conserved. (d) they both have the same change in magnitude of momentum because momentum is conserved. (e) none of the above is necessarily true. 2. a small boat coasts at constant speed under a bridge. a heavy sack of sand is dropped from the bridge onto the boat. the speed of the boat (a) increases. (b) decreases. (c) does not change. (d) without knowing the mass of the boat and the sand, we can’t tell.
Answers: 1
What led astronomers to believe in the existence of dark matter?
A. the fact that space is black
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