How long does it take for a rotating object to speed up from 15.0 rad/s to 33.3 rad/s if it has a uniform angular acceleration of 3.45 rad/s2?
A) 4.35 s
B) 5.30 s
C) 9.57 s
D) 10.6 s
E) 63.1 s
B
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Dimensional Analysis: When adding several quantities
A. the quantities can have any combination of units.
B. the quantities must all have exactly the same units.
C. the quantities must all be dimensionless.
Identify the falsi?able statement below
A) President Kennedy's murder was orchestrated by an undetectable shadow government of the United States. B) The Sun is at the center of the solar system. C) The laws of nature are magni?cent and beautiful. D) The universe was created by God.
The attraction between unlike substances is called
A) adhesion. B) cohesion. C) depends on the substances.
The stride of a horse would be quicker if more mass in its legs were concentrated
A) in the upper part, nearer the horse's body. B) towards its feet. C) halfway up its legs. D) uniformly all along its legs. E) none of the above