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A spherical source radiates sound uniformly in all directions. At a distance of 13 m, the sound intensity level is 80 dB.
(a) At what distance from the source is the intensity level 30 dB?
(b) What power is radiated by this source?
A long wire is known to have a radius greater than 5.6 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
an electron and a proton are each accelerated through a potential difference pf 10.0 million volts. Find the momentum ( in MeV/c) and the kinetic Energy ( in MeV) of each and compare with the results of using the classical Formular.
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Two capacitors, C1 = 6.00 µF and C2 = 14.0 µF, are connected in parallel and the resulting combination is connected to a 9.00 V battery. What is the equivalent capacitance of the combination
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A person is standing 8 m away from a speaker and experiences an intensity level consistent with the standard pain threshold. what is the power of the speaker
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