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
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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?
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
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.
Which region (a-b-c) is a phenolic functional group?
A) a B) b C) c D) b or c E) b and c