In what year did the United States officially adopt the metric system?

a. 1893
b. 1995
c. 2011
d. 1776
e. none of these


a

Physics & Space Science

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Which region (a-b-c) is a phenolic functional group?

A) a B) b C) c D) b or c E) b and c

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Where must an object be placed with respect to a converging lens of focal length 30 cm if the image is to be virtual, and three times as large as the object?

What will be an ideal response?

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According to the principle of equivalence, observations made of falling objects at Galileo's Leaning Tower of Pisa are indistinguishable from observations made in

A) a spaceship orbiting in a gravitational field. B) a spaceship accelerating at g in deep space. C) any uniformly moving reference frame. D) all of the above E) none of the above

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Imagine comparing a 1.2 solar mass white dwarf to a 1.0 solar mass white dwarf. Which of the following must be true?

A) The 1.2 solar mass white dwarf has a higher surface temperature. B) The 1.2 solar mass white dwarf has a smaller radius. C) The 1.2 solar mass white dwarf has a larger radius. D) The 1.2 solar mass white dwarf is supported by neutron degeneracy pressure; the 1 solar mass white dwarf is supported by electron degeneracy pressure. E) The 1.2 solar mass white dwarf has a lower surface temperature.

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