What is the angular momentum of the moon about the Earth? The mass of the moon is 7.35 × 10^22 kg, the center-to-center separation of the Earth and the moon is 3.84 × 10^5 km, and the orbital period of the moon is 27.3 days. Ignore the small offset of the center of mass of the system from the center of the Earth in your calculation
2.89 × 10^34 kg/m2/s
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What fraction of the Galaxy's mass is in a form that does not emit electromagnetic radiation?
A. about 90% B. about 10% C. about 50% D. Zero percent; all of the Galaxy emits some form of light.
A wormhole is a
A) passageway to a parallel universe through a black hole B) shortcut between two distant parts of the universe through hyperspace C) shortcut between two distant parts of the universe through a black hole D) way of traveling faster than the speed of light
A heat engine has an efficiency of 35.0% and receives 150 J of heat per cycle
(a) How much work does it do in each cycle? (b) How much heat does it "waste" in each cycle?
A parallel plate capacitor of capacitance C0 has plates of area A with separation d between them. When it is connected to a battery of voltage V0, it has charge of magnitude Q0 on its plates. While it is connected to the battery, the space between the plates is filled with a material of dielectric constant 3. After the dielectric is added, the magnitude of the charge on the plates and the new capacitance are what?
A.
Q0, 
C0B.
C0C.
D.
E.