A 0.40-m3 insulated piston-cylinder device initially contains 1.3 kg of air at 30°C. At this state, the piston is free to move.
Now air at 500 kPa and 70°C is allowed to enter the cylinder from a supply line until the volume increases by 50%. Using constant specific heats at room temperature, determine (a) the final temperature, (b) the amount of mass that has entered, and (d) the work done; and (d) entropy generation
1 answer:
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The load is 17156 N.
<u>Explanation:</u>
First compute the flexural strength from:
σ = FL / π
= 3000 (40
10^-3) / π (5
10^-3)^3
σ = 305 10^6 N / m^2.
We can now determine the load using:
F = 2σd^3 / 3L
= 2(305 10^6) (15
10^-3)^3 / 3(40
10^-3)
F = 17156 N.
Answer:
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Explanation:
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Answer:
The correct solution is "5.74%".
Explanation:
The given values are:
Gravity of aggregate,
Gravity of asphalt,
Asphalt concrete mixture,
We know that,
Now,
The theoretical specific gravity of mix,
⇒
By putting the values, we get
hence,
The percentage of voids will be:
⇒ %V =
=
=
= (%)