The intensity level of a "Super-Silent" power lawn mower at a distance of 1.0 m is 100 dB. You wake up one morning to find that four of your neighbors are all mowing their lawns using identical "Super-Silent" mowers
When they are each 20 m from your open bedroom window, what is the intensity level of the sound in your bedroom? You can neglect any absorption, reflection, or interference of the sound. The lowest detectable intensity is 1.0 × 10-12 W/m2. A) 80 dB
B) 104 dB
C) 400 dB
D) 50 dB
E) 40 dB
A
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The number of molecules in one mole of a substance
A) depends on the molecular weight of the substance. B) depends on the atomic weight of the substance. C) depends on the density of the substance. D) depends on the temperature of the substance. E) is the same for all substances.
A pipe of length L will support the lowest fundamental frequency in which of these cases?
1.if it were closed at both ends 2.if it were open at both ends 3.if it were open at one end and closed at the other 4.All of these cases support the same fundamental frequency because the pipe is the same length for each case.
The uncharged particle inside an atom is a neutron
a. True b. False Indicate whether the statement is true or false
Why is spectroscopy important to astronomers?
What will be an ideal response?