During a total lunar eclipse,
a. the moon must be new.
b. the observer must be in the path of totality.
c. the moon's color will be affected by Earth's atmosphere.
d. the moon must be at about its greatest distance from Earth.
e. it must be near the time of one of the equinoxes.
C
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A molecule takes 3.0 seconds to diffuse across a membrane. If the thickness of the membrane is doubled, then how long does it take the molecule to diffuse across the thicker membrane?
A. 30 hours B. 24 hours C. 20 hours D. 18 hours E. 12 hours
An example of a diatomic molecule of an element is
a. He b. N2 c. P4 d. CO
Conversion of Units: An American football field, including end zones, is 360 feet long and 160 feet wide. If you needed to describe it for someone in Europe using the metric system, which one of the following quantities would be closest to its area in square meters? (2.54 cm = 1.00 in.)
A. 4920 m2 B. 5350 m2 C. 88.0 m2 D. 12,100 m2 E. 13,200 m2
You are driving a late model convertible car at the 65 mph speed limit with its soft flexible roof closed up and the windows closed. You observe that the roof
A) bows inward. B) is no different from when the car was at rest. C) bows outward. D) bows inward only when you are driving uphill. E) bows inward only when you are driving downhill.