Mort observes Velma's light-clock, as Velma passes. He observes that, during a 1 second tick of her clock, her light beam travels
A) 300,000 km.
B) a distance of one light year.
C) less than 300,000 km.
D) further than 300,000 km.
E) no distance at all.
D
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How much heat must be removed from steam to change it to liquid?
A) 540 cal/g B) 600 cal/g C) 830 cal/g D) 1 kcal/g E) 1.8 kcal/g
You have available lenses of focal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. If you could use any two of these lenses to build a telescope, what is the maximum magnification you could achieve for comfortable viewing of a planet?
A) 2.0 B) 4.0 C) 6.0 D) 8.0
Briefly describe two key pieces of evidence that support the Big Bang theory.
What will be an ideal response?
If the radiation curve for an incandescent lamp filament peaks in the green region, the object would appear
A) red. B) yellow. C) green. D) blue. E) white.