A4-chamber in series flocculation basin has a paddlewheel in each chamber. the chambers treat a flow of 5 mgd. the first paddlewheel has an applied power of 2 kw, the second 1 kw, the 3rd 0.5 kw and the 4th 0.25 kw. each of the 4 chambers is 4 m3. the water temperature is 10oc. the influent contains 150,000 particles per ml and the particles average 15 in diameter. determine the average diameter of the particles leaving the last chamber. assume

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  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.

Repeated trials allow you to calculate a mean which can reduce the effect of random errors to make your results more precise.your results will also be reproducible therefore if someone else did the same experiment they'd get the same results which would make your results more reliable.

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.