A person with normal eyesight uses a converging lens of focal length 10 cm. He holds the lens close to his eye to finish an engraving job. At what distance from the job he must hold the lens?
A) -7.1 cm
B) 7.1 cm
C) -30 cm
D) 30 cm
E) 20 cm
B
Physics & Space Science
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During an isothermal process, 5.0 J of heat is removed from an ideal gas. What is the work done in the process?
A. zero B. -5.0 J C. +5.0 J D. none of the above
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One of the most remarkable discoveries by biologists over recent decades is that life can
A) survive in an astonishing variety of environments B) only exist in a very narrow range of environments C) only exist under conditions that exist on Earth D) survive in any and every environment, however harsh
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No spacecraft has landed on a Jovian planet moon
Indicate whether the statement is true or false
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