Physics, 08.08.2019 21:30 sagetpc68741
The first clue that the galaxy contains a lot of dark matter was the observation that the orbital velocities of stars did not decreases with increasing distance from the center of the galaxy. construct a rotation curve for the solar system by using the orbital velocities of the planets, which can be found in appendix f. how does this curve differ from the rotation curve for the galaxy? what does it tell you about where most of the mass in the solar system is concentrated?
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Physics, 21.06.2019 20:30
When a book falls from a shelf to the ground without anyone pushing on it, no work is done on the book. true or false
Answers: 1
Physics, 22.06.2019 09:00
When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical
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Physics, 22.06.2019 13:00
Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.
Answers: 1
Physics, 22.06.2019 15:00
Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive
Answers: 2
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