The wavelengths of the sounds produced by two horns are 6.0 m and 7.0 m, respectively. What beat frequency is heard when the horns are sounded on a day when the speed of sound is 340 m/s?
A) 5 Hz
B) 6 Hz
C) 7 Hz
D) 8 Hz
D
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The lattice parameter of CsCl is 0.4123 nm. Calculate the density of CsCl.
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What is the angular separation of the two second-order spectral lines having wavelengths 417 nm and 388 nm using a diffraction grating having 456 lines/mm?
A) 1.63° B) 1.52° C) 0.815° D) 3.26°
Which one of the following is the correct representation of the relationship between the speed of a wave (v), frequency of the wave (f), and its wavelength (?)?
A) v = 2? B) v = 2f C) v = ?/f D) v = f? E) v = f/?
An electron has an initial velocity to the south but is observed to curve upward as the result of a magnetic field. This magnetic field must have a component
A) to the west. B) to the east. C) upward. D) downward. E) to the north.