If not a single solid sheet, then the ring system of Saturn is best described as:

A. rapidly expanding gas with various different chemical compositions.
B. randomly moving particles that will soon disperse in all directions.
C. individually orbiting particles that are clustered around certain orbits.
D. just an illusion.
E. randomly moving particles that frequently collide, so that the force of collision quickly pushes the rings apart.


Ans: C. individually orbiting particles that are clustered around certain orbits.

Physics & Space Science

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Suppose we observe a source of X-rays that varies substantially in brightness over a period of a few days. What can we conclude?

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The term observable universe refers to ________

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A metal sphere of radius 2.0 cm carries a charge of 3.0 ?C. What is the electric field 6.0 cm from the center of the sphere?

What will be an ideal response?

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A proton, which moves perpendicular to a magnetic field of 1.4 T in a circular path of radius 0.074 m, has what speed? (qp = 1.60 × 10^?19 C and mp = 1.67 × 10^?27 kg)

a. 7.3E+5 m/s b. 2.8E+7 m/s c. 5.1E+6 m/s d. 9.9E+6 m/s e. 3.9E+6 m/s

Physics & Space Science