At first, the Sun's present-day rotation seems to contradict the prediction of the nebular theory because
A) the theory predicts that the axis of rotation should not be perpendicular to the orbital plane of the planets, but it is.
B) the axis of rotation precesses slowly, which the theory does not predict.
C) the present-day rotation is in the opposite direction from that predicted by the theory.
D) the theory predicts that the Sun should have been rotating fast when it formed, but the actual rotation is fairly slow.
E) the theory predicts that the Sun should not have been rotating when it formed, but the Sun actually rotates today.
D
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If a wave's frequency doubles and its speed stays constant, its wavelength
A) becomes 16× longer. B) is also doubled. C) is unchanged, as c is constant. D) is now 4× longer. E) is halved.
The product of a radioactive decay is called the "daughter."
a. True b. False Indicate whether the statement is true or false
In x-ray machines, electrons are subjected to electric fields as great as 6.0 × 10^5 N/C. Find an electron's acceleration in this field. (me = 9.11 × 10^?31 kg, e = 1.6 × 10^?19 C)
a. 1.1E+17 m/s2 b. 3.4E+13 m/s2 c. 8.7E+10 m/s2 d. 2.9E+8 m/s2 e. 4.1E+13 m/s2
The anomalous Zeeman effect occurs because electrons have intrinsic spin, and when placed in a magnetic field, lose their degeneracy for the __________ states with different ________ . Fill in the missing words