How was the rotation rate of Jupiter's core determined?
A) by observing the Great Red Spot
B) by watching Io move across the disk of Jupiter
C) by radio observations of Jupiter's rapidly spinning magnetosphere
D) by observing the fastest moving regions of Jupiter's equator
E) by measuring the oblateness of Jupiter's disk
C
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The answer to a question is [[MLT?1]]. The question is "What are the dimensions of
A.
B.
C.
D.
E.
?"How wide must a narrow slit be if the first diffraction minimum occurs at ±12° with laser light of 633 nm?
a. 3.0 × 10^?6 m b. 3.0 × 10^?5 m c. 6.1 × 10^?6 m d. 6 .1× 10?5 m e. 1.5 × 10^?6 m
Three resistors, 80 ?, 10 ?, and 70 ?, are wired in parallel and connected to a 120-V battery. How much current flows in this circuit?
a. 0.75 ? b. 15 ? c. 950 ? d. 0.0021 ?
Because Earth's orbit is slightly elliptical, Earth actually gets closer to the Sun during part of the year. When Earth is closer to the Sun its orbital speed is
A) less than when Earth is farthest away from the Sun. B) the same as when Earth is farthest away from the Sun. C) greater than when Earth is farthest away from the Sun. D) sometimes greater sometimes smaller than when Earth is farthest away from the Sun.