Which of the following are the units of a henry and a farad respectively?
a. J × s2/C2 and C2/J
b. V × s/A and V/C
c. V/(A × s) and C/V
d. N × m/A2 and 1/J
e. None of the above
A
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The mass of Neptune can be calculated from measurements of
A) Neptune's orbital period and its distance from the Sun. B) the Sun's mass and how Neptune's speed changes during its elliptical orbit around the Sun. C) the masses of Neptune's moons, Triton and Nereid. D) the gravitational influence of Jupiter and Saturn on Neptune's orbit around the Sun. E) the orbital period and distance of the moon Triton from Neptune.
Including relativistic effects, doubling the speed of a object:
a. doubles its momentum. b. more than doubles its momentum. c. less than doubles its momentum. d. has no effect on its momentum.
Of the terrestrial planets, Mars seems most promising to exobiologists
Indicate whether the statement is true or false
A proton (+1.6 × 10^?19 C) moves 20 cm on a path in the direction of a uniform electric field of strength 2.4 N/C. How much work is done on the proton by the electrical field?
a. 7.7E–20 J b. ?7.7E–20 J c. 1.8E–19 J d. ?8.6E–20 J e. zero