If an AC circuit consists of a 220 mH inductor in series with a 25 pF capacitor and an AC generator with rms voltage of 12 V. If the frequency of the generator is 55 kHz, what will the rms voltage drop across the capacitor be?
A. 5.4 V
B. 0.20 V
C. 6.6 V
D. 11.80 V
A. 5.4 V
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A car is initially moving at 30 m/s east and a little while later it is moving at 10 m/s north. Which of the following best describes the orientation of the average acceleration during this time interval?
a. north of west c. west b. northwest d. north of east
Kepler's second law tells us that planets sweep out equal areas in equal times. If you compare the amount of area per time swept by Earth with the one of Jupiter, you would conclude:
A) They sweep the same area per time. B) They sweep different areas per time. C) Jupiter sweeps a larger area per time because it has much more mass than Earth. D) Earth sweeps a larger area per time because it has much less mass than Jupiter.
Rotational velocity outside the visible boundary of our Galaxy is ________ than would be expected on the basis of observed stars and gas, indicating the presence of ________.
A. higher; dark matter B. smaller; white dwarfs C. zero; a vacuum D. lower; gas
which of the following is true about Copernicus's Model of the cosmos
a) Retrograde motion is an apparent motion which occurs when Earths passes or laps a planet such as Mars as they both orbit the Sun b) the outer planets orbit the Earth in perfect circles c)Earth is at the center of the cosmos