Acoustic impedances of the fluid bottom material
If a plane wave is reflected from the ocean floor at normal incidence with a level 20 dB below that of the incident wave, what are the possible values of the specific acoustic impedances of the fluid bottom material?
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Name the scale of measurement that applies to each of the following situations:
A single-effect evaporator system with thermal recompression is being used to concentrate skim milk from an initial total solids content of 9.5%to 25%. The product feed temperature is 5°C and the evaporation is occurring at 57.38 kPa.
Calculate the number of vacancies per cubic meter in some metal at 688°C. The energy for vacancy formation is 0.87 eV/atom.
The length of conversations between supervisors and workers in a certain manufacturing industry is normally distributed with a mean of 4.0 minutes and a standard deviation of 0.8 minutes.
A particle with mass m is confined on a line with length L. With uncertainty principle, estimate the minimum energy of the particle.
A bike rider has a frontal area of 0.4 m2 and a drag coefficient, CD of 0.9. If he is pedaling at 80 rpm a) what average torque on the crank would he need to keep a steady 20 mph on level ground?
The coefficient of compressibility is 8.0 x10^-7 atm^-1. Estimate the molar volume of Al2O3 at 400 degrees celsius and 10 kbars pressure (10x10^3 atm).
What is the angular separation of two spectral lines of wavelengths 440 nm and 388 nm formed in order m=2 with a 382 line/mm grating? Express the answer in degrees with two decimal places.
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