Physics, 24.07.2020 01:01 hunnytoledo145
Most quasars seem to be at distances greater than 5 billion light years from Earth. Which of the following can best be inferred from this observation? A) Quasars existed near the beginning of the universe. B) Quasars give off very little visible light. C) Quasars are in the centers of galaxies. D) Quasars are associated with large black holes. E) Quasars exist in galaxies like the Milky Way.
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An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?
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The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.
Answers: 3
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