The Paleozoic era begins with the Cambrian and concludes with the
A) Ordovician period.
B) Silurian period.
C) Permian period.
D) Triassic period.
Answer: C
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Which of the following is an example of a vector quantity?
a. velocity b. temperature c. volume d. mass
A balloon originally has a volume of 1.0 m3 when the gas in it is at 20°C and under a pressure of 1.0 atm. As it rises in the earth's atmosphere, its volume expands
What will be its new volume if its final temperature and pressure are -40°C and 0.10 atm? A) 8.0 m3 B) 6.0 m3 C) 4.0 m3 D) 2.0 m3
Energy Conservation With Conservative Forces: Joe and Bill throw identical balls vertically upward. Joe throws his ball with an initial speed twice as high as Bill. If there is no air resistance, the maximum height of Joe's ball will be
A. four times that of Bill's ball. B. two times that of Bill's ball. C. equal to that of Bill's ball. D. eight times that of Bill's ball. E. roughly 1.4 times that of Bill's ball.
Single-Slit Diffraction: A single-slit diffraction pattern is formed on a distant screen. Assuming the angles involved are small, by what factor will the width of the central bright spot on the screen change if the slit width is doubled?
A. It will be cut to one-quarter its original size. B. It will be cut in half. C. It will double. D. It will become four times as large. E. It will become eight times as large.