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Category > Engineering Posted 23 May 2017 My Price 15.00

Verify that the inertia head was justifiably neglected in Problems

Verify that the inertia head was justifiably neglected in Problems 7.20 and 7.21.

Problems 7.20

A large tank with vertical sides is divided by a vertical partition into two sections A and B, with plan areas of 1.5 m2 and 7.5 m2 respectively. The partition contains a 25 mm diameter orifice (Cd = 0.6) at a height of 300 mm above the base. Initially section A contains water to a depth of 2.15 m and section B contains water to a depth of 950 mm. Calculate the time required for the water levels to equalize after the orifice is opened

Problems 7.21

Two vertical cylindrical tanks, of diameters 2.5 m and 1.5 m respectively, are connected by a 50 mm diameter pipe, 75 m long for which f may be assumed constant at 0.01. Both tanks contain water and are open to atmosphere. Initially the level of water in the larger tank is 1 m above that in the smaller tank. Assuming that entry and exit losses for the pipe together amount to 1.5 times the velocity head, calculate the fall in level in the larger tank during 20 minutes. (The pipe is so placed that it is always full of water.)

 

Answers

Alpha Geek
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Status NEW Posted 23 May 2017 10:05 AM My Price 15.00

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file 1495534855-Answer.docx preview (241 words )
V-----------eri-----------fy -----------tha-----------t t-----------he -----------ine-----------rti-----------a h-----------ead----------- wa-----------s j-----------ust-----------ifi-----------abl-----------y n-----------egl-----------ect-----------ed -----------in -----------Pro-----------ble-----------ms -----------7.2-----------0 a-----------nd -----------7.2-----------1. ----------- Pr-----------obl-----------ems----------- 7.-----------20 ----------- A -----------lar-----------ge -----------tan-----------k w-----------ith----------- ve-----------rti-----------cal----------- si-----------des----------- is----------- di-----------vid-----------ed -----------by -----------a v-----------ert-----------ica-----------l p-----------art-----------iti-----------on -----------int-----------o t-----------wo -----------sec-----------tio-----------ns -----------A a-----------nd -----------B, -----------wit-----------h p-----------lan----------- ar-----------eas----------- of----------- 1.-----------5 m-----------2 -----------and----------- 7.-----------5 m-----------2 -----------res-----------pec-----------tiv-----------ely-----------. T-----------he -----------par-----------tit-----------ion----------- co-----------nta-----------ins----------- a -----------25 -----------mm -----------dia-----------met-----------er -----------ori-----------fic-----------e (-----------Cd -----------= 0-----------.6)----------- at----------- a -----------hei-----------ght----------- of----------- 30-----------0 m-----------m a-----------bov-----------e t-----------he -----------bas-----------e. -----------Ini-----------tia-----------lly----------- se-----------cti-----------on -----------A c-----------ont-----------ain-----------s w-----------ate-----------r t-----------o a----------- de-----------pth----------- of----------- 2.-----------15 -----------m a-----------nd -----------sec-----------tio-----------n B----------- co-----------nta-----------ins----------- wa-----------ter-----------
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