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An un-insulated tank having a volume of 0.5 m3 contains air at 35°C, 130 kPa, and 20 percent relative humidity. The tank is connected to a water supply line in which water flows at 50°C. Water is sprayed into the tank until the relative humidity of the air-vapor mixture is 90 percent. Determine the amount of water supplied to the tank, in kg, the final pressure of the air-vapor mixture in the tank, in kPa, and the heat transfer required during the process to maintain the air- vapor mixture in the tank at 35°C.
Heat is transferred to the water such that the temperature in the tank remains constant. Determine the amount of heat that must be transferred by the time one half of the total mass has been withdrawn.
The piezometer A is located 4,000 ft south of piezometer B. Approximately 3,000 ft of piezometer B there is a river with an elevation relative to sea level of about 455 ft.
Ends A and D of the two solid steel shafts AB and CD are fixed, while ends B and C are connected to gears. Knowing that a 4-kN(m) torque T is applied to gear B, determine the maximum shearing stress (a) in shaft AB, (b) in shaft CD.
A composite price index for the cost of vegetarian foods called eggs, artichokes, and tofu (EAT) was 330 ten years ago and has averaged an annual increase of 12% since. Calculate the current value of the index.
What is the theoretical maximum amount of work that could be done by a gas in a piston expanding from 10 L to 20 L (pressure of the surrounding atmosphere is 100 KPa)? What assumptions do you have to make to achieve this theoretical maximum? How much..
A cylinder has 500cm^3 of water. After a mass of 100 grams of sand is poured into the cylinder and all air bubbles are removed by a vacuum pump, the water level rises to 537.5 cm^3. Determine the specific gravity of the sand.
an aluminium wire and a steel wire each of length 2.0m are hung from the ceiling. a 5.0kg mass is suspended from the
A steam locomotives had scoops installed that took water from a tank located between the tracks and lifted water into the tender. To lift the water 12 ft with a scoop, neglecting all losses, what speed in mph is required?
The rigid bar abcd is supported by a pin at B and restrained by identical steel bars at C and D, each of area 250mm 2 . if the temperature is increased by 8 0 C, find out the force P that will cause the bar at c to be stress-free.
Determine the most profitable blend of alloys that will satisfy the requirements. Hints: Let your control variables be as follows: x1 is the number of tons of alloy 1 used to make the steel, x2 is the number of tons of alloy 2 used to make the steel,..
During frequent braking under race conditions the disk brake rotors on the car described above reach a temperature of 500C. These disk brakes rely on forced convection to cool them.
Determine the dimensions of the box that will minimise thecosts of materials.Based on material costs alone,how many bins canthe manufacturer produce?
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