48 grams of oxygen at room temperature consists of how many moles?
a. 3.0
b. 1.5
c. 0.75
d. more than 3.0
e. less than 0.75
b
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The increase in the amount of carbon dioxide in the atmosphere is responsible for __________
Fill in the blank(s) with correct word
A particular material has an index of refraction of 2.75 . What percent of the speed of light in vacuum is the speed of light in the material?
a. 36% b. 10% c. 8% d. 89%
This diagram represents the life track of a 1 solar-mass star from its pre-main-sequence stages to just before its final death. Refer to the life stages labeled with roman numerals. During which stage is the star's energy supplied primarily by gravitational contraction?
A) Stage ii B) Stage iii C) Stage v D) Stage vi E) Stage viii
At a given location in space, the potential is known to be greater when one moves in any direction. To be more specific, no matter which direction one goes, a small step in that direction results in an increase in the potential by the same amount. This means that the Electric field at this location is
A. Can take on any value at all. B. Zero C. Negative D. Positive