Sweating cools people because:
A) it releases latent heat.
B) it changes the heat capacity of the body.
C) colder molecules in a passing wind adhere to the wet skin.
D) it involves a transfer of sensible heat.
Answer: A
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On a worldwide basis ________ provides the largest percentage of renewable energy.
A. wind B. hydroelectricity C. biomass D. solar
Describe the radiation emitted from both the Sun and the Earth in terms of the electromagnetic spectrum
What will be an ideal response?
Which of the following correctly describes the relationship between the R,S system and the actual rotation associated with optically active compounds?
A) All R enantiomers are dextrorotatory. B) All S enantiomers are dextrorotatory. C) No S enantiomers are dextrorotatory, but some R enantiomers are levorotatory. D) There is no general relationship between the R,S designation and the actual direction of rotation of plane polarized light.
Which two countries emit approximately 40% of all the world's carbon dioxide?
a. United States and Russia b. United States and Germany c. United States and China d. China and Russia e. China and India