Oxygen in Earth's atmosphere is outgassed in volcanic eruptions
a. True
b. False
Indicate whether the statement is true or false
False
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Kepler's Laws: Two moons orbit a planet in circular orbits. Moon A has orbital radius R, and moon B has orbital radius 4R. Moon A takes 20 days to complete one orbit. How long does it take moon B to complete an orbit?
A. 20 days B. 80 days C. 160 days D. 320 days E. 5 days
At t = 0 the switch S is closed with the capacitor uncharged. If C = 30 ?F, ? = 30 V, and R = 5.0 k?, at what rate is energy being stored in the capacitor when I = 2.0 mA?
a.
32 mW
b.
40 mW
c.
44 mW
d.
36 mW
e.
80 mW
Blood flow is directly proportional to _____ and inversely proportional to ____.
After the New Horizons flyby, scientists concluded that Pluto has probably been geologically active within the past 100 million years or less. Why?
A. Large regions of the surface have very few impact craters. B. We see places where liquid water has been upwelling from as subsurface ocean. C. Smooth regions of the surface are made of nitrogen ice. D. The surface coloration can only be explained by active volcanism. E. Tall mountains are made of water ice.