If the density of the Universe is ________ than the critical density, then the Universe will ________.
A. larger; expand forever
B. larger; eventually collapse in a "Big Crunch"
C. less; eventually collapse in a "Big Crunch"
D. less; not change in size
Answer: B
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What is the difference in frequency of the two sound waves? A) 10.0 Hz B) 0.200 Hz C) 5.00 Hz D) 2.50 Hz E) 1.25 Hz
If a baseball were scaled up to the size of planet Earth, each of its atoms would be about the size of
A) a baseball stadium. B) a flea. C) an atom. D) a ping-pong ball.
A particle (charge = 5.0 ?C) is released from rest at a point x = 10 cm. If a 5.0-?C charge is held fixed at the origin, what is the kinetic energy of the particle after it has moved 90 cm?
a. 1.6 J b. 2.0 J c. 2.4 J d. 1.2 J e. 1.8 J
In _________fracture, the fracture surface follows the grain boundaries.
Fill in the blank(s) with the appropriate word(s).