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oee [108]
3 years ago
14

A rigid tank with a volume of 4 m^3 contains argon at 500 kPa and 30 deg C. It is connected to a piston cylinder (initially empt

y) with a line and a closed valve. The pressure in the cylinder should be 300 kPa to float the piston. Now the valvle is slowly opened and heat is transferred so the argon reaches a final state of 30 deg C with the valve open. The heat transfer takes place from a 60 deg C space through a conduction layer 1 cm thick with a conductivity k = 0.1 W/mK and a surface area of 1.5 m^2.
a. Find the final volume of the argon and the total work for the process.

b. Find the total heat transfer needed.

c. How long will the process take?

Engineering
1 answer:
vesna_86 [32]3 years ago
3 0

Answer:

a) Final Volume: 6.667 m³, Total Work = 1.02175 MJ

b) Heat Transfer = 1.02175 MJ

c) Time: t = 37 min, 50.5 seconds (37.84 minutes OR 0.63 hours)

Explanation:

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Air at 40C flows over a 2 m long flat plate with a free stream velocity of 7 m/s. Assume the width of the plate (into the paper)
mezya [45]

Complete Question

Air at 40C flows over a 2 m long flat plate with a free stream velocity of 7m/s. Assume the width of the plate (into the paper) is 0.5 m. If the plate is at a co temperature of 100C,find:

The total heat transfer rate from the plate to the air

Answer:

q=1.7845

Explanation:

From the question we are told that:

Air Temperature T_1=40c

Length l=2m

Velocity v=7m/s

Width w=0.5

Constant temperature T_t= 100C

Generally the equation for Total heat Transfer is mathematically given by

 q=hA(T_s-T_\infty)

Where

h=Convective heat transfer coefficient

 h=29.9075w/m^2k

Therefore

 q=h(L*B)(T_s-T_\infty)

 q=29.9075*(2*0.5)(100+273-(40+273))

 q=1794.45w

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3 years ago
If you want to obtain a Class E license before you turn 18, you must______. A. be in compliance with school attendance requireme
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Answer:

The correct option is;

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Answer:

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3.It have ports                                                3.It have vales

                                                                         

4.Greater requirement of cooling              4.Lesser requirement of cooling  

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