Which of the following statements about dark matter and dark energy is/are true? choose one or more: both exceed the matter-energy equivalent of luminous matter. dark matter has only an attractive gravitational effect, while dark energy is repulsive. while the nature of dark matter has been determined, the nature of dark energy has not.
Answers: 1
Physics, 21.06.2019 20:20, jacesmokesloud7254
Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?
Answers: 2
Physics, 22.06.2019 00:30, adantrujillo1234
What are the theoretical properties of a gas at a temperature of 0 kelvin?
Answers: 3
Physics, 22.06.2019 06:30, haha81
Which of these statements is true? a. quarks pair with leptons to form protons and neutrons. b. quarks pair with bosons to form photons. c. quarks pair with photons to form protons and neutrons. d. quarks pair with other quarks to form protons and neutrons. e. quarks pair with electrons to form protons.
Answers: 1
Which of the following statements about dark matter and dark energy is/are true? choose one or more...
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