The SI unit of power is the ______________
Fill in the blank(s) with correct word
watt
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Which of these wins the prize as the blandest appearing planet as revealed visually by space probes?
a. Jupiter b. Saturn c. Uranus d. Neptune
Unlike the ultraviolet photons originally emitted by the embedded stars of an emission nebula, the photons emitted by the recombination of electrons with atoms:
A) do not escape the nebula. B) escape the nebula. C) are re-absorbed by neutral hydrogen atoms. D) bounce around inside the nebula. E) are scattered by the dust particles.
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.
Why does our theory predict that neutron stars will spin rapidly?
What will be an ideal response?