A friend from Europe asks what the length of a 100-yd football field would be in meters. After doing the conversion, what would you tell her?
91.4 m
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For a BCC crystal, which of the following x-ray (hkl) diffraction peaks is not present?
(a) (200) (b) (110) (c) (130) (d) (111)
Based on current estimates of the value of Hubble's constant, approximately how old is the universe?
A) 10 billion years old B) 12 billion years old C) 14 billion years old D) 18 billion years old E) 20 billion years old
This photo shows an undersea volcanic vent. What is it, and what is its significance to the study of the origin of life?
A) Genetic studies suggest that life may have originated around vents like this one. B) It is the place where we have found the oldest living organisms on Earth. C) It is the place where we have found the oldest fossils on Earth. D) It shows that fires can burn underwater.
What do you think are the reasons that European buildings are in general more energy-efficient than American buildings?
What will be an ideal response?