Fundamentals Of Thermodynamics
10th Edition
ISBN: 9781119494966
Author: Borgnakke, C. (claus), Sonntag, Richard Edwin, Author.
Publisher: Wiley,
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Textbook Question
Chapter 1, Problem 1.29P
A valve in the cylinder shown in Fig. P1.29 has a cross-sectional area of
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1. Two pipes A & B caries an oil of specific gravities 0.9 & 1.2 respectively. The center of the pipe A is 75 cm above the pipe B. The height of oil in right limb is 35 cm. Also, the mercury level difference is found in right limb as 60 cm. Find the pressure difference between these two pipes in kPa. Also find the pressure equivalent in water head in mm.
A. The difference of pressure between two pipes (PA-Pa) (Unit is in kPa) =
B. Equivalent to Water head in mm =
: The cylinder shown in Fig. (2), Acytinder=7.012cm², has two pistons mounted, the upper
one, mp1 =100kg, initially resting on the stops. The lower piston (mp2 =0kg) has 2kg water
below it, with a spring (linear) in vacuum connecting the two pistons. The spring force is
zero when the lower piston stands at the bottom, and when the lower piston hits the
stops the volume is 0.3m?. The water, initially at 50kPa, V =0.00206m, is then heated to
saturated vapor. Determine:
(1) the initial temperature (2) the pressure that will lift the upper piston (3) The
condition of steam when the lower piston hits the stops (4) the work done by the water
(at saturated vapor state).
Patm=101.325kPa
Piston 1
stops
Piston 2
H:0
Fig.2
3. Answer with solutions
Chapter 1 Solutions
Fundamentals Of Thermodynamics
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