Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. Sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. Which one, if either is correct?
A. Beryl, because low thermal conductivity results in low heat transfer.
B. Beryl, because low thermal conductivity results in high heat transfer.
C. Sapphire, because low thermal conductivity results in low heat transfer.
D. Sapphire, because low thermal conductivity results in high heat transfer.
E. Neither, because low heat transfer is desirable both in summer and in winter.
Answer: E
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A) 3 × 1074 B) 3 × 1044 C) 3 × 1024 D) 3 × 10-34 E) 3 × 10-44
Which of the following would lead to a warmer temperature for a planet?
A) a decrease in the planet's reflectivity B) a decrease in the planet's amount of greenhouse gases C) a decrease in the brightness of the Sun D) a decrease in the number of volcanic eruptions on the planet
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What will be an ideal response?
Modern nuclear bomb tests have created an extra high level of 14C in our atmosphere. Suppose that future archaeologists date samples from our era, but do not know about this testing
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