What are the chemical and physical properties of the solar system that any theory of its origin must explain?
What will be an ideal response?
The inner planets have high densities, moderate atmospheres, and a mostly rocky composition. The outer planets have low densities, thick atmospheres, and a composition of mostly hydrogen and helium. The asteroids are composed of primitive, unevolved material unlike planets and the comets are icy objects that have also remained unchanged since the formation of the solar system.
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An observer in the Southern Hemisphere takes a time exposure photograph of the night sky. If the illustration below depicts the photograph taken by the observer, which direction was the camera pointing?
a.
straight north
b.
straight east
c.
straight south
d.
straight west
e.
straight up, directly overhead
Which of the following is not an exception to the general patterns of motion in the solar system?
A) the "backward" orbit of Triton around Neptune B) the extreme axis tilt of Uranus C) the counterclockwise rotation of Venus D) the large size of Earth's moon E) the rings of Saturn
Newly-formed neutron stars start with weak magnetic fields, but they strengthen over time into pulsars
Indicate whether the statement is true or false
A rod (length = 2.0 m) is uniformly charged and has a total charge of 5.0 nC. What is the electric potential (relative to zero at infinity) at a point which lies along the axis of the rod and is 3.0 m from the center of the rod?
a. 22 V b. 19 V c. 16 V d. 25 V e. 12 V