Stony meteorites are common among falls
a. True
b. False
Indicate whether the statement is true or false
True
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A particle is moving with a constant acceleration of 4.0 m/s2. Its speed at t = 1.0 s is 4.0 m/s and at t = 3.0 s it is 12.0 m/s. What is the area under the position-time graph for the interval from t = 1.0 s to t = 3.0 s?
A. 8.0 m/s B. 8.0 m C. 12 m D. 16 m E. 16 m/s2
A resistor is connected to an AC power supply. On this circuit, the current
A) leads the voltage by 90°. B) lags the voltage by 90°. C) is in phase with the voltage. D) leads the voltage by 45°. E) lags the voltage by 45°.
Which of the following is true of quasars?
A) Quasar eruptions became less common as galaxies became more stable. B) Quasars did not exist until about five billion years ago. C) Quasars have comparatively smaller look-back time than most galaxies. D) Quasars eruptions were not common when galaxies were actively forming and colliding.
The ancient goal of astrology was to
A) understand the origin of Earth. B) make a more accurate model of the universe. C) predict the passing of the seasons. D) predict human events. E) antagonize astronomers.