A geosynchronous satellite:
a. must be close enough to Earth's surface that the gravitational acceleration, g, remains essentially the same.
b. remains stationary in space.
c. remains directly above a specific location on Earth's surface.
d. revolves around the Moon, not Earth.
e. takes one week to complete a revolution around Earth.
c
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Charge of a uniform density (8.0 nC/m2) is distributed over the entire xy plane. A charge of uniform density (5.0 nC/m2) is distributed over the parallel plane defined by z = 2.0 m. Determine the magnitude of the electric field for any point with z = 1.0 m.
A. 0.45 kN/C B. 0.17 kN/C C. 0.28 kN/C D. 0.73 kN/C E. 0.62 kN/C
A circuit breaker often serves the same purpose as a
A) battery B) fuse. C) capacitor. D) all of the above E) none of the above
The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km. Assume the acoustic output of a howler to be uniform in all directions and that the threshold of hearing is 1.0 × 10-12 W/m2
A juvenile howler monkey has an acoustic output of 63 µW. What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity I0, at a distance of 210 m? A) 110 B) 230 C) 76 D) 170 E) 300
How do we know sunspots have magnetic fields?
A. Wien's law B. the Zeeman effect C. We have measured the sunspots' fields with spacecraft. D. the Hubble effect E. None of these choices is correct.