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Answer the following statement true (T) or false (F)
True
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Discuss several disadvantages of refractor versus reflector telescopes
What will be an ideal response?
For every 100 gallons of gasoline you use in your car, the amount that actually goes into moving the car down the road is roughly
A) 10 gal. B) 50 gal. C) 2 gal. D) 98 gal. E) 75 gal.
When learning about light, we predicted that Venus should have a temperature of 250 K based on its albedo and distance from the Sun. Why is Venus's observed average surface temperature equal to 740 K, which is hot enough to melt lead?
a. Venus has slow, retrograde rotation, and its seasons are very long. b. Venus has many active volcanoes that release heat into its atmosphere. c. Venus has a very thin atmosphere, and more sunlight falls onto its surface. d. Venus has a strong greenhouse effect. e. Venus has a highly eccentric orbit and is sometimes much closer to the Sun than other times.
A power line carries 1000 A at a height of 20 m above the ground. What is the resulting magnetic field at ground level?
A. 50 mT
B. 0.13 mT
C. 13 
T
D. 10 
T
E. 5.0T