In an isochoric process, the internal (thermal) energy of a gas decreases by 50 J. How much work is done by the gas during this process?

A) -25 J B) -50 J C) 0 J D) 50 J E) 25 J


C

Physics & Space Science

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Parallel-Plate Capacitor: When the potential difference between the plates of an ideal air-filled parallel plate capacitor is 35 V, the electric field between the plates has a strength of 750 V/m. If the plate area is 4.0 × 10-2 m2, what is the capacitance of this capacitor? (?0 = 8.85 × 10-12 C2/N ? m2)

A. 7.6 × 10-14 F B. 7.6 × 10-12 F C. 7.6 × 10-11 F D. 7.6 × 10-10 F E. None of the other choices is correct.

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Astronomers infer that the universe is expanding because distant galaxies all appear to

A) be growing in size. B) be moving away from us, with more distant ones moving faster. C) be made mostly of dark matter. D) rotate rapidly.

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Scientists use the metric system chiefly because it is more accurate than the English system

A) True B) False

Physics & Space Science

The quantity "pressure" expressed in terms of the fundamental quantities (mass, length, time) is equivalent to

a. MLT?1. b. ML?1T?2. c. M2L?1T?3. d. a dimensionless quantity.

Physics & Space Science