The ratio of the density of a material to the density of water is the
a. mass density
b. weight density
c. specific gravity
d. buoyant force
e. none of the above
C
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Standing Sound Waves: An organ pipe of length L that is open at one end resonates in its third harmonic with a wavelength of 2L/3. Is the other end of the pipe closed or open?
A. closed B. open C. We cannot tell from the information provided.
When a stellar iron core collapses, large numbers of neutrinos are formed, and then:
A) they form the neutron star. B) they are absorbed by electrons to produce positrons. C) they are captured to form heavy elements. D) they are captured to form light elements. E) they immediately pass through the core and escape to space.
Which one of the arrows below most closely indicates the direction of the bob’s acceleration when it is at point 1?
A. A B. B C. C D. D E. E F. F
If the interplanar spacing of NaCl is 2.814 × 10?10 m, what is the predicted angle at which X-rays of wavelength 0.140 nm will be diffracted in a first-order maximum?
A. 31.3° B. 7.20° C. 20.5° D. 14.4° E. 29.8°