According to Galileo, a rolled ball eventually comes to a stop because
A) of friction.
B) of inertia.
C) it seeks its natural state of rest.
D) all of the above
Answer: A
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A top of rotational inertia 4.0 kg m2 receives a torque of 2.4 Nm from a physics professor. The angular acceleration of the body will be
A. 6.0 rev/s2. B. 0.6 rad/s2. C. 1.2 rev/s2. D. 1.0 rad/s2. E. 6.0 rad/s2.
The motion of a piston in an auto engine is simple harmonic. If the piston travels back and forth over a distance of 10 cm, and the piston has a mass of 1.5 kg, what is the maximum speed of the piston and the maximum force acting on the piston when the engine is running at 4 200 rpm?
Besides fossil fuels, the only other significant commercial sources of energy are ______________ and ______________
Fill in the blank(s) with correct word
Which of these colors of light has photons of greatest energy?
a. Red b. Orange c. Green d. Yellow