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.

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science

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

Physics & Space Science