How much further away from speaker must observer walk
An observer that is standing 12m from a stereo sound speaker perceives the sound level from the speaker to be 60 dβ. How much further away from the speaker must the observer walk to hear a sound level of 50 dβ?
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Object 1 has a temperature of 95° C and object 2 has a temperature of 35° C. What is the ratio of the net power emitted by object 1 to that radiated by object 2?
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