Which would require the greater energy; slowing the orbital speed of a satellite so it crashes into Earth, or increasing the orbital speed so it escapes Earth?

A) slowing down
B) speeding up
C) same each way


Answer: C

Physics & Space Science

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Which of the following is a neutral subatomic particle?

a. neutron b. proton c. electron d. neutron and proton e. electron and neutron

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Thin Lenses: A certain slide projector has a lens of focal length 15.0 cm. This lens forms an image measuring 100 cm × 100 cm on the screen when a slide whose dimensions are 50.0 mm × 50.0 mm is being magnified. How far from the lens should the screen be placed?

Fill in the blank(s) with the appropriate word(s).

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Capacitance: What charge accumulates on the plates of a 2.0-?F air-filled capacitor when it is charged until the potential difference across its plates is 100 V?

A. 50 ?C B. 100 ?C C. 150 ?C D. 200 ?C

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What is the correct electronic configuration for ground state carbon, which has 6 electrons?

A) 1s22s22p2 B) 1s12p1 C) 1s12s22p1 D) 1s12s12p1 E) 1s22s22p4

Physics & Space Science