The "Local Bubble" is:
A) created by our Sun's solar wind, and extends well past Pluto's orbit.
B) created by the bipolar jets of the young Sun, perpendicular to the ecliptic.
C) about 100 pcs. across and transparent to extreme ultraviolet radiation.
D) the region around the Milky Way where we can trace out its magnetic field.
E) the cluster of galaxies our Milky Way and M-31 in Andromeda belong to.
C
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A hunter aims a rifle at an angle of 10° below the horizontal. The hunter fires a bullet while simultaneously dropping another bullet from the side of the rifle. The bullet to hit the ground first is
A) the dropped one. B) the fired one. C) both hit at the same time
A slender uniform rod 100.00 cm long is used as a meter stick. Two parallel axes that are perpendicular to the rod are considered. The first axis passes through the 50-cm mark and the second axis passes through the 30-cm mark
What is the ratio of the moment of inertia through the second axis to the moment of inertia through the first axis? A) I2/I1 = 1.5 B) I2/I1 = 1.7 C) I2/I1 = 1.9 D) I2/I1 = 2.1 E) I2/I1 = 2.3
Long ago a runaway greenhouse effect greatly transformed the planet
A) Mercury. B) Venus. C) Mars. D) none of the above
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