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A rigid vessel contains 10 kg of steam. The steam is initially at 10 bar and 300C. After a period of time the pressure in the vessel is reduced to 1 bar due to heat transfer with the surroundings. The surroundings are at a constant temperature of 20C. Determine the change in entropy of the system, the surroundings and the universe during this process.
two kilograms of saturated water vapor at 600 kpa are contained in a piston-cylinder device. the water expands
assume that the ends of the bar have been kept at 100 degrees c for a long time. then at some instant call it t0 the
In the wind tunnel experiment, four wall taps are used to measure pressure. Are those wall taps used to measure pressure of the air very close to the wall surface? What is the velocity of air close to the wall surface? Are the wall taps used to measu..
If the box weighs 200 lbs, what force must be in each cord for the system to be in equilibrium? Cable AB is 1.5m and the vertical distance from B to A (marked as "y") is 0.75m
an 8-m long unisulated square duct of cross sectional 0.2-m x 0.2-m and relative roughness 10-8 passes through the
as given in the sketch kerosene at 90f is being drained through 100 feet of 4 inch schedule 80 pipe from a storage tank
water droplets at 87 0c in a cooling tower have an average diameter of 0.15 cm. the airstream which moves at a velocity
What is the true altitude of the plane above sea level? What would be the indicated altitude after landing at an aerodrome located at sea level? (Gas const = R=288 J/KgK)
The asymmetric simple truss is loaded as shown. Determine the reactions at A and D. Neglect the weight of the structure compared with the applied loads. Is the knowledge of the size of the structure necessary?
a layer of ice is placed on a flat hot surface with a constant temperature of 70 degc. the initial layer thickness is
a 75-g ball is projected from a height of 1.6m with a horizontal velocity of 2ms and bounces from a 400g smooth plate
question 1. a mild steel bar 40 mm diameter and 100 mm long is subjected to a tensile force along its axis.youngs
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