A string that is 0.26 m long is vibrating in its n = 6 harmonic. The sound from this string excites a pipe that is long and open at both ends into its second overtone resonance
What is the common resonant frequency of the string and the pipe? The speed of sound in air is 345 m/s.
A) 760 Hz B) 690 Hz C) 390 Hz D) 490 Hz E) 590 Hz
E
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Which of the following best describes what would happen if a 1.5 solar mass neutron star, with a diameter of a few kilometers, were suddenly to appear in your hometown?
A) It would rapidly sink to the center of the Earth. B) It would crash into the Earth, throwing vast amounts of dust into the atmosphere which in turn would cool the Earth. Such a scenario is probably what caused the extinction of the dinosaurs. C) The combined mass of the Earth and the neutron star would cause the neutron star to collapse into a black hole. D) The entire mass of the Earth would end up as a thin layer, about 1 cm thick, over the surface of the neutron star. E) It would crash through the Earth, creating a large crater, and exit the Earth on the other side.
Why does Jupiter have several distinct cloud layers?
A) Different gases are present at different altitudes in Jupiter's atmosphere. B) Clouds form randomly, so on average there are always several layers. C) Different layers represent the various regions where the temperature is cool enough for liquid water to condense. D) Winds prevent clouds from forming at some altitudes, so we see clouds only at the other altitudes. E) Different layers represent clouds made of gases that condense at different temperatures.
Two small cylindrical plastic containers with flat bottoms are placed on a turntable that has a smooth flat surface. Canister A is empty; canister B contains lead shot. Each canister is the same distance r from the center. The coefficient of static friction between the canisters and the turntable is ?s. When the speed of the turntable is gradually increased,
a. only the lighter container slides outward off the turntable; the heavier one stays on. b. only the heavier container slides outward off the turntable; the lighter one stays on. c. both containers slide off the turntable at the same turntable speed. d. the lighter container slides inward. e. the heavier container slides inward.
A 3.00-kg block of silicon at 60.0°C is immersed in 6.00 kg of mercury at 20.0°C. What is the entropy increase of this system as it moves to equilibrium?
The specific heat of silicon is 0.17 cal/(g?K) and the specific heat of mercury is 0.033 cal/(g?K). A) 8.8 × 10-1 J/K B) 4.8 J/K C) 6.9 J/K D) 5.2 × 10-2 J/K E) -0.46 J/K