Water surrounds hot horizontal tubes 3 cm in diameter in a nuclear steam generator having surface temperature of 800ºC. The water is at a pressure of 800 kPa. If film boiling is assumed, estimate the total convection heat transfer coefficient between the water and the tube surfaces.

What will be an ideal response?


Using Mathcad for the analysis here and obtaining properties of water from the

saturation Appendix Table B-6 and then using Equation 10-11, Bromley’s equation, the

convective heat transfer coefficient can be predicted.

Physics & Space Science

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A segment of wire of total length 2.0 m is formed into a circular loop having 5.0 turns. If the wire carries a 1.2-A current, determine the magnitude of the magnetic field at the center of the loop

a. 79 mT b. 69 mT c. 59 mT d. 89 mT e. 9.4 mT

Physics & Space Science

An alcohol is distinguished by having one or more ______________ groups in the molecule

Fill in the blank(s) with correct word

Physics & Space Science

The presence of breccias among the lunar rock samples shows that

a. volcanism did not occur on the Moon. b. molten lava once flowed over the lunar surface. c. the crust must have been made of anorthosite. d. water once existed on the Moon in the form of small lakes and streams. e. the lunar surface was fragmented by meteorite impacts.

Physics & Space Science