The planet Saturn is approximately 10 times farther away from the Sun than the Earth is. Given this, how much sunlight does it receive compared to the Earth?
A) 1/1,000th
B) 1/10,000th
C) 1/100th
D) 1/10th
C
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In Galileo's thought experiment about rolling balls, Galileo argued that:
a. a ball rolling up the tilted surface speeds up. b. a ball rolling down the tilted surface slows down. c. a ball rolling on a level surface speeds up. d. a ball rolling on a the level surface continues at the same speed. e. a ball rolling on a level surface slows down.
All the following statements are true. Which of them are considered to be "exceptions" to the general trends described by the first three major features of the solar system?
A. Pluto is in the outer solar system but is ice-rich in composition. B. Jupiter's largest moon, Ganymede, is even larger than Earth's moon. C. Our Moon has a diameter more than 1/4 the diameter of Earth. D. Venus rotates in a direction opposite to the rotation of the other terrestrial planets. E. Uranus rotates with an axis tilt that lies nearly in the ecliptic plane.
The image formed by a concave mirror when the object distance is greater than the focal length is always
A. at a distance greater than the focal length. B. real. C. right side up. D. virtual.
Force on a Wire: A wire in the shape of an "M" lies in the plane of the paper. It carries a current of 2.0 A, flowing from A to E, as shown in the figure. It is placed in a uniform magnetic field of 0.85 T in the same plane, directed as shown on the right side of the figure. The figure indicates the dimensions of the wire. Note that AB is parallel to DE and to the baseline from which the magnetic field direction is measured. What are the magnitude and direction of the force acting on section DE of this wire?
A. 0.30 N perpendicular out of the page B. 0.12 N perpendicular into the page C. 0.30 N perpendicular into the page D. 0.12 N perpendicular out of the page E. 0.20 N perpendicular out of the page