Processed meteorites with low metal content probably are
A) leftover chunks of rock from the earliest period in the formation of the solar system.
B) pieces of comets rather than of asteroids.
C) chunks of a larger asteroid that was shattered by a collision.
D) chunks of rock chipped off the planet Mercury.
E) chunks of rock chipped off the planet Mars.
C
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What factor caused different planets to form out of different types of material?
A) The angular momentum of the forming planet; faster rotating planets lost the lightest elements. B) The quantity of dust particles in the solar nebula; more dust caused some planets to contain heavier elements. C) The variation in temperature throughout the solar nebula; the higher the temperature, the lower the percentage of light elements in the forming planet. D) The angular momentum of the solar nebula pushed the heavy elements towards the outer regions of the nebula. E) The innate variation of chemical composition of the original nebula; the outer parts of the nebula contained a greater abundance of heavy elements.
A spaceship traveling at constant speed away from the Sun crosses the orbit of Earth and later crosses the orbit of Mars
What is the distance between these two events in the spaceship frame of reference? The radius of Earth's orbit is 150 × 109 m and that of Mars is 228 × 109 m.
Two long parallel wires are a distance d apart. The current in one wire is 10 A and the current in the other wire is 30 A. The currents are in the same direction. If the 30-A current is increased to 50 A, by what factor does the magnitude of the magnetic field midway between the wires change?
a. 2 b. 4 c. 25/9 d. 5/3
A conducting rectangular loop of mass M, resistance R, and dimensions a×b is allowed to fall from rest through a uniform magnetic field which is perpendicular to the plane of the loop. The loop accelerates until it reaches a terminal speed (before the upper end enters the magnetic field). If a = 2.0 m, B = 6.0 T, R = 40 ?, and M = 0.60 kg, what is the terminal speed?
A. 1.6 m/s B. 20 m/s C. 2.2 m/s D. 26 m/s E. 5.3 m/s