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The observed pitch alone makes it possible to judge whether a sound source is
Q13: When the frequency of a source is
Q13: At room temperature,which of the following diatomic
Q16: A box rests on a horizontal
Q24: Two identical cylindrical discs have a common
Q50: If the temperature is 30ºC and the
Q54: On the basis of the kinetic theory
Q60: A string with mass density equal to
Q64: A raft of density 700 kg/m<sup>3</sup> has
Q92: A set of waves has a speed
Q120: When driving over a washboard speed bumps,certain