Vector = 6.0 m and points 30° north of east. Vector = 4.0 m and points 30° south of west. The resultant vector + is given by
A) 2.0 m at an angle 30° north of east.
B) 2.0 m at an angle 60° north of east.
C) 10.0 m at an angle 60° east of north.
D) 10.0 m at an angle 30° north of east.
E) 10.0 m at an angle 60° north of east.
A
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Pluto's density is most similar to:
A) the terrestrial planets. B) the jovian planets. C) moons of the jovian planets. D) Mercury, but nor Venus, Earth, or Mars. E) Saturn, but not Jupiter, Uranus, or Neptune.
A 1 000-kg sports car accelerates from zero to 25 m/s in 7.0 s. What is the average power delivered by the automobile engine?
a. 8.9E+4 W b. 1.8E+3 W c. 4.5E+4 W d. 1.8E+5 W e. 5.4E+4 W
The radiation curve for a blue hot star peaks in the
A) infrared region. B) red region. C) yellow region. D) ultraviolet region. E) none of the above
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.