What is the intensity of sound from a band with a sound level of 129 dB? (I0 = 10?12 W/m2)
a. 7.94 W/m2
b. 1.29 W/m2
c. 79.4 W/m2
d. 12.9 W/m2
e. 129 W/m2
a
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What is the radius of curvature of the path of a 3.0-keV proton in a perpendicular magnetic field of magnitude 0.80 T?
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