You throw a Frisbee of mass m and radius r so that it is spinning about a horizontal axis perpendicular to the plane of the Frisbee. Ignoring air resistance, the torque exerted about its center of mass by gravity is
a. 0.
b. mgr.
c. 2mgr.
d. a function of the angular velocity.
e. small at first, then increasing as the Frisbee loses the torque given it by your hand.
A
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The point in Earth's orbit where Earth is farthest from the sun is known as
a. aphelion. b. perihelion. c. precession. d. the winter solstice e. a and d
An electric generating plant produces 400 MW of electric power while operating at 40% efficiency. The rate at which this plant consumes energy [in the form of the thermal energy obtained by burning the coal that is fed into the plant] is
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Conducted in 1953, the ________ experiments were designed to show what types of complex molecules might have formed in the Earth's primitive environment
Fill in the blank(s) with correct word