Explain how shepherd moons constrain the motions of small particles into a narrow ring about a planet
What will be an ideal response?
A moon tends to push ring particles away from it. Two shepherding moons are then able to push ring particles together into a narrow ring that lies between the orbits of the two moons.
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An oxygen molecule has a moment of inertia of 5 × 10^?46 kg ? m2 . Calculate the bond length (in nm). Recall that the atomic mass of oxygen is 16 u (1 u = 1.66 × 10^?27 kg)
a. 0.3 b. 0.1 c. 0.2 d. 0.4 e. 0.5
The thermal motions of the atoms in a gas cloud can make it collapse to form a protostar
a. True b. False Indicate whether the statement is true or false
Suppose that we double the electrical power flowing into the filament of an incandescent bulb. By what factor will the most probable photon energy ? p increase?
A. 2 1/4 B. 21/3 C. 21/2 D. 2 E. 4 F. 8 T. 16
A particle (q = ?4.0 ?C, m = 5.0 mg) moves in a uniform magnetic field with a velocity having a magnitude of 2.0 km/s and a direction that is 50° away from that of the magnetic field. The particle is observed to have an acceleration with a magnitude of 5.8 m/s2 . What is the magnitude of the magnetic field?
a. 5.3 mT b. 4.9 mT c. 5.1 mT d. 4.7 mT e. 3.6 mT