Rocks are found on the surface of another planet which appear to have been formed at the bottom of an ancient ocean. Given this, they are most likely to be classified as
A) metamorphic
B) igneous
C) meteoritic
D) sedimentary
D
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Suppose you wish to lower the pitch of a violin string by 2 octaves. This could be done by
A) reducing the string tension by a factor of four. B) shortening the string length to a quarter as much. C) replacing the string with one of the same material only half as massive. D) replacing the string with one of the same material but with quadruple the diameter. E) increasing the string tension a factor of four.
A 1000-turn toroidal solenoid has a central radius of 4.2 cm and is carrying a current of 1.7 A. What is the magnitude of the magnetic field inside the solenoid at the central radius? (?0 = 4? × 10-7 T ? m/A)
A) 81 mT B) zero C) 16 mT D) 8.1 mT E) 51 mT
In what way does our theory of nuclear fusion predict that the Sun should be different today than it was when fusion began about 4-1/2 billion years ago?
A) The Sun's mass should be about 30% higher today. B) The Sun's mass should be about 30% lower today. C) The Sun's luminosity should be about 30% higher today. D) The Sun's radius should be about 30% higher today. E) The Sun's distance from Earth should be about 30% lower today.
Significant Figures: What is the product of 12.56 and 2.12 expressed to the correct number of significant figures?
A. 27 B. 26.6 C. 26.23 D. 26.627