Each edge of a cube has a length of 50.8 cm. What is the length of a diagonal of the cube going through the center of the cube?
a. 20.0 in
c. 34.6 in
b. 28.8 in
d. 50.8 in
C
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Uniform Circular Motion: A child sits on a merry-go-round, 1.5 meters from the center. The merry-go-round is turning at a constant rate, and the child is observed to have a radial acceleration of 2.3 m/s2. How long does it take for the merry-go-round to make one revolution?
Fill in the blank(s) with the appropriate word(s).
The ________ are two doughnut-shaped rings of charged particles trapped by Earth's magnetic field.
A. convection cells B. jet streams C. Van Allen Radiation Belts D. Aurora Borealis and the Aurora Australis
The net force on any object in equilibrium is
A) zero. B) equal to its weight. C) less than its weight. D) non-zero when motion is involved.
Most coal deposits were formed in the
A) Cenozoic era. B) Mesozoic era. C) Paleozoic era. D) Precambrian era.