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Physics, 21.06.2019 19:40
Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yĪ“y, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86Ī“x=7.86 meters directly in front of speaker a.
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Physics, 21.06.2019 20:30
Asmall metal bar, whose initial temperature was 10Ā° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70Ā° c if it is known that its temperature increases 2Ā° during the first second? (the boiling temperature for water is 100Ā° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98Ā° c? (round your answer to one decimal place.)
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Physics, 22.06.2019 03:50
Aspecimen of oil having an initial volume of 580cm^3 is subjected to a pressure increase of 4.0 mpa, and the volume is found to decrease by 0.40 cm^3. (a) what is the bulk modulus of the material? (b) what is the compressibility of the material?
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Why is the answer b for this question? i know acceleration should be negative down but i don't know...
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