The Sun's atmosphere consists of the ________ and the ________.
A. chromosphere; corona
B. photosphere; chromosphere
C. photosphere; corona
D. corona; solar wind
Answer: A
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We have sent several spacecraft on trajectories that will ultimately take them into interstellar space (including Pioneer 10 and 11, Voyager 1 and 2, New Horizons). How long will it take these spacecraft to travel as far as the nearest stars?
A) tens of thousands of years B) a few hundred years C) a few decades D) never, because they will rust and fall apart E) about a thousand years
The lowest tone to resonate in an open pipe of length L is 400. Hz. What is the frequency of the lowest tone that will resonate in a closed pipe of length 2L?
A) 200. Hz B) 1.60 kHz C) 100. Hz D) 400. Hz E) 0.800 kHz
When bullets are fired in a forward direction from a fighter aircraft, the momentum of the aircraft
A) decreases. B) is unchanged. C) increases.
An incredible amount of electrical energy passes down the funnel of a large tornado every second. Measurements at a distance of 12.8 km from a large tornado showed an almost constant magnetic field of 2.35 × 10^?8 T associated with the tornado. What was the average current going down the funnel? (µ0 = 4? × 10^?7 T?m/A)
a. 3.0E+3 A b. 1.5E+3 A c. 7.5E+2 A d. 9.6E+2 A e. 4.7E+3 A