Notice that Earth's axis is shown with an arrowhead in this diagram. What does the arrow point to?
A) the Sun
B) the ecliptic plane
C) the center of the Milky Way Galaxy
D) Polaris, the North Star
E) the Northern lights
D) Polaris, the North Star
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Impedance: What inductance must be put in series with a 200-? resistor at 4.00 kHz to have a total impedance of 240 ??
A. 3.28 mH B. 4.28 mH C. 5.28 mH D. 6.28 mH E. 12 mH
About how much mass does the Sun lose through nuclear fusion per second?
A) 4 tons B) 4 million tons C) 600 tons D) 600 million tons E) None; mass is conserved.
What is the saros cycle?
A) the 26,000-year cycle of the Earth's precession B) the roughly 18-year cycle over which the pattern of eclipses repeats C) the roughly one-month cycle of lunar phases in the sky D) the annual cycle of the seasons
A single-turn loop of wire, having a resistance of 8.00 ? and a cross-sectional area 200 cm2, is perpendicular to a uniform magnetic field that increases steadily from 0.200 T to 2.800 T in 2.20 seconds
What is the magnitude of the induced current in the loop? A) 2.95 A B) 3.18 A C) 0 A D) 3.18 mA E) 2.95 mA