A satellite is in a circular orbit about the Earth at a distance of two Earth radii above the surface. What is the speed of the satellite? (The radius of the Earth is 6.4 × 10^6 m, and G = 6.67 × 10^?11 N × m2/kg2.)
a. 2 800 m/s b. 4 600 m/s
c. 5 600 m/s d. 17 000 m/s
b
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What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 × 10-4 m2? (?0 = 4? × 10-7 T • m/
A) A) 4.19 nH B) 4.19 pH C) 4.19 µH D) 4.19 mH E) 4.19 H
If the electric flux through a rectangular area is 5.0 N m2/C, and the electric field is then doubled, what is the resulting flux through the area?
A) 5.0 N m2/C B) 10 N m2/C C) 2.5 N m2/C D) 1 N m2/C E) 20 N m2/C