Angela claims that she wears a cylindrical-shaped hollow gold bracelet because it expands less than a solid one with a change in temperature. Clarissa claims that a cylindrical-shaped solid gold bracelet expands less than a hollow one. Which one, if either, is correct?
a. Angela, because the bracelet expands outward on its outer surface and inward on its inner surface. b. Clarissa, because the bracelet expands outward on its outer surface and inward on its inner surface. c. Angela, because the inner circumference does not change, but the outer circumference expands.
d. Clarissa, because the inner circumference does not change, but the outer circumference expands.
e. Neither, because both the inner and outer circumferences increase in length.
E
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The _____ of quasars imply that they must be at great distances, some farther away than any known galaxy
A) large redshifts B) small redshifts C) large blueshifts D) small blueshifts
Single-Slit Diffraction: Using monochromatic light of 410 nm wavelength, a single thin slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum. The same slit, when illuminated by a new monochromatic light source, produces a diffraction pattern with the second minimum at a 60.0° angle from the central maximum. What is the wavelength of this new light?
A. 276 nm B. 293 nm C. 309 nm D. 326 nm E. 342 nm
Since accelerations are equivalent to gravity, a person could cancel the effects of Earth's gravity by
A) falling from a high place. B) going into orbit around Earth. C) Both of the above. D) accelerating straight upward at an acceleration of 1g. E) Nonsense--you can't cancel the effects of gravity.
A quarterback takes the ball from the line of scrimmage, runs backward for 12 yards, then sideways parallel to the line of scrimmage for 18 yards. He then throws a 47-yard forward pass straight downfield perpendicular to the line of scrimmage. The receiver is tackled immediately. How far is the football displaced from its original position?
a. 39 yards b. 47 yards c. 31 yards d. 62 yards e. 66 yards