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Water is moving with a speed of 2.3 m/s through a perfectly sealed long pipe with a cross sectional area of 5 cm2. The water descends m as the pipe changes in area to 4cm2. The absolute pressure in the higher section of pipe is 1atm. The pipe is never open to the air.

(a) What is the speed of the water through the lower level of pipe?

(b) What is the absolute pressure in the pipe, at the lower level?

( c) What is the gauge pressure at the higher level?

(d) What volume of water passes through the pipe in 66 minutes?

2.A wire 4 m long and with a mass of 0.5 g is under a tension of 112N. It is made out of the material aluminum. What is the speed of transverse waves in the wire?

(b) What is the wavelength of the third harmonic of vibration?

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