The book discussed two different "zones of habitability"; describe and compare them
What will be an ideal response?
For stars, their zones would lie close enough to the star for planets like Earth to have liquid water oceans, but not so close they would turn into Venus. For the Sun, this zone extends from the orbits of Venus out to Mars. The brighter the star, the larger this zone around it would extend. But the Galactic zone would be more related to the potential for an active nucleus to create so much energy in a quasar-like phase to wipe out life near it on the inside, and on the outside to the fact that at the outer edge of the disk, the rate of star formation (and planet formation as well) drops off greatly; for the Milky Way, this zone is probably about 10,000 to 50,000 light years from the center.
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When you stand in front of a convex mirror, the image you see is
a. real and inverted. b. real and upright. c. virtual and inverted. d. virtual and upright. e. real and inverted if your distance from the mirror is greater than two focal lengths.
An object of mass 4.00 kg is sitting at the top of an inclined plane of height h and angle ? with the horizontal. The object slides down the inclined plane and right before it reaches the bottom of the plane, it has speed of 16.0 m/s
Neglect friction and use g = 10.0 m/s2. (a) What is the height of the inclined plane? (b) If the height of the inclined plane is raised to 15.0 m, what is the speed of the object right before it reaches the bottom of the inclined plane?
The transit method of planet detection works best for
A) big planets in face-on orbits around small stars. B) big planets in edge-on orbits around small stars. C) Earth-like planets in any orbit. D) small planets in face-on orbits around big stars. E) small planets in edge-on orbits around big stars.
If we double only the mass of a vibrating ideal mass-and-spring system, the mechanical energy of the system
A) increases by a factor of . B) increases by a factor of 2. C) increases by a factor of 3. D) increases by a factor of 4. E) does not change.