An organ pipe closed at one end has a length of 60 centimeters. What is the wavelength of the second harmonic?
A. 20 cm
B. 60 cm
C. 80 cm
D. 100 cm
C. 80 cm
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Gravitational lensing is caused by ____
a. refraction of light through hot intracluster gas b. stimulated emission of light passing through dark matter c. acceleration of photons by supermassive black holes d. scattering of photons off of thin intergalactic dust e. bending of light rays due to the curvature of space-time around a mass
The first small solid grains or flakes formed in our solar system by the process of ____________, the addition of material to an object an atom or molecule at a time
a. accretion b. sublimation c. hydration d. condensation e. vaporization
How does the mass of Jupiter compare with that of the other planets?
A) It is slightly larger and more massive than Saturn. B) It is similar to that of the Earth and Venus. C) It is twice as massive as all other planets combined. D) It is almost as massive as Saturn. E) It is about a tenth the mass of the Sun.
The density of aluminum is 2700 kg/m3. If transverse waves travel at in an aluminum wire of diameter what is the tension on the wire?
A) 65 N B) 39 N C) 52 N D) 78 N