At the end of December, all of the Southern Hemisphere is in
A) darkness.
B) light.
C) summer.
D) winter.
Answer: C
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Which is NOT a reason that silicon is unsuitable as a building block for life compared to carbon?
A) silicon—silicon bonds are much weaker than carbon—carbon bonds B) silicon does not form multiple bonds with itself, limiting the complexity of molecules it can form C) silicon does not bond with many other elements D) silicon dioxide is a high melting point solid and, hence, cannot be used to transfer silicon atoms like gaseous carbon dioxide can be used to transport carbon atoms
A vessel containing 10 kg of water is left out where it evaporates. If the temperature remains constant at 20°C, what is the change in entropy (in kcal/K)? (The latent heat of vaporization at 20°C is 585 cal/g.)
a. 30 b. 10 c. 20 d. 40 e. 290
What is the only element in your body that was formed during the Big Bang, and not in cores of stars? Explain how you know this
What will be an ideal response?
As you comb your hair, electrons are rubbed onto the comb, which becomes
A) negatively charged. B) positively charged. C) ionized.