The Rare Earth Hypothesis suggests that
A) the circumstances that have allowed life on the Earth to appear and develop may be so rare that it is unlikely to have occurred anywhere else
B) Earth and life on it were created by some omnipotent being
C) the orbits of any Earth-like planets around other stars would have been disrupted by inward migration of Jovian planets
D) Earth-like planets are unlikely to have formed around any other stars
A
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First Law of Thermodynamics: An external heat source supplies heat to a system at a rate of 187 W as the system does work at a rate of 131 W. At what rate is the internal (thermal) energy of the system changing?
A. -56 W B. 320 W C. 56 W D. 190 W E. -320 W
If a moving object hits a still object, what happens to the momentum of the moving object?
a. The momentum of the moving object is increased by the force of the collision. b. The momentum of the moving object goes to zero at the moment of collision. c. The two stick together and move at the same speed afterward. d. The momentum of the moving object is decreased by the amount of momentum the stationary object picks up at the time of the collision. e. The momentum of the moving object matches the momentum of the stationary object.
Which layer of the Sun do we normally see?
A) photosphere B) corona C) chromosphere D) convection zone E) radiation zone
A 4.0-cm tall object is placed 60 cm in front of a convex lens of focal length of magnitude 30 cm. What are the nature and location of the image?
A) The image is real, 2.5 cm tall, 30 cm on the same side as object. B) The image is virtual, 2.5 cm tall, 30 cm on the other side of the lens. C) The image is virtual, 2.0 cm tall, 15 cm on the other side of the lens. D) The image is virtual, 4.0 cm tall, 60 cm on the same side as object. E) The image is real, 4.0 cm tall, 60 cm on the other side of the lens.