If the diameter of the solar image cast by a pinhole is equal to the diameter of a coin that just covers it, and 110 coins would fit between the image and the pinhole, the Sun must be
A. 55 Sun diameters from Earth.
B. 110 Sun diameters from Earth.
C. not enough information
D. impossible to say
Answer: B
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This country does NOT have a Persian Gulf coast:
A) Saudi Arabia B) Bahrain C) Iraq D) Oman
Which of the following is useless to animals leaving at great depths, due to the high pressures there?
A. a swim bladder B. a swim bladder full of gas C. a swim bladder full of lipids D. a large mouth E. fins
What are some of the important public-policy issues relating to water quality?
What will be an ideal response?
The field of conservation biology ________
A) was initially viewed as too measurement oriented, looking at details and not at the big picture B) attempts to integrate an understanding of evolution and extinction into their field research C) tries to conserve every species, everywhere D) endeavors to increase speciation events in order to increase biodiversity E) developed in response to government intervention