At what frequency will a 50.0-mH inductor have a reactance XL = 700 ??
a. 352 Hz
b. 777 Hz
c. 1.25 kHz
d. 2.23 kHz
e. 14 kHz
d
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Why do the jovian planet interiors differ?
A) Accretion took longer further from the Sun, so the more distant planets formed their cores later and captured less gas from the solar nebula than the closer jovian planets. B) They differ due to giant impacts at the late stages of planet formation. C) The more distant planets had longer to form than the closer planets, since the solar nebula lasted longer at greater distances from the Sun. D) The more distant planets formed in a cooler region of the solar nebula and therefore contain a greater proportion of ices than the closer jovian planets.
Identical 8.0-?C point charges are positioned on the x axis at x = ±1.0 m and released from rest simultaneously. What is the kinetic energy of either of the charges after it has moved 2.0 m?
a. 84 mJ b. 54 mJ c. 96 mJ d. 63 mJ e. 48 mJ
Briefly explain why Earth feels a greater tidal force from the Moon than from the Sun, even though it feels a greater gravitational force from the Sun
What will be an ideal response?
A tennis ball is held above and in contact with a basketball, and then both are simultaneously dropped. The tennis ball bounces off the basketball at a fairly high speed. This is because:
a. the basketball falls farther than the tennis ball. b. the tennis ball is slightly shielded from the Earth's gravitational pull. c. the massive basketball transfers momentum to the lighter tennis ball. d. the tennis ball has a smaller radius.