Define shepherd moons and give an example of them at work
What will be an ideal response?
The two small moons on each side of Saturn's F ring herd the particles into this narrow, twisted ring.
You might also like to view...
The safest way to view an image of the Sun is to use
A) a telescope. B) binoculars. C) a pinhole. D) colored sunglasses.
The field just outside the surface of a long conducting cylinder which has a 2.0-cm radius points radially outward and has a magnitude of 200 N/C. What is the charge density on the surface of the cylinder?
A. 2.7 nC/m2 B. 1.8 nC/m2 C. 3.5 nC/m2 D. 4.4 nC/m2 E. 0.90 nC/m2
Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2. In this case,
A) Galaxy 1 must be twice as big as Galaxy 2. B) we are seeing Galaxy 1 as it looked at an earlier time in the history of the universe than Galaxy 2. C) we are seeing Galaxy 1 as it looked at a later time in the history of the universe than Galaxy 2. D) Galaxy 2 must be twice as old as Galaxy 1.
The amount of light reaching the film in a camera is determined by the
A) shutter speed. B) f-stop. C) focal length of the lens.. D) focusing. E) diameter of the aperture.