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What percentage of the electronsoriginally in the cube was removed? By what percentage has themass of the cube decreased because of this removal?
Estimate the temperature (inoC) to which the block must be heated, so that the hole and cylinder have the same diameter. The coefficient of thermal expansion for steel is alphasteel = 12 x 10-6/oC.
A 18 AWG copper wire is used to connect the device to a 24V power source. What is the maximum allowable length of wire (in m)? Assume the wire is maintained at room temperature.
A double effect evaporator is to be employed in concentrating 15% solution of NaOH at 700F to 40%. Determine the overall steam economy in both cases.
Fully draw shear force and bending moment diagrams, noting all important values. Develop equations for bending moment as a function of location in the beam (x = 0 at the left support)
Draw Mohrs Circle for a point on top of the cross-section of the beam where the maximum bending moment occurs. Determine the principal stresses and draw an element showing the principal planes.
The hole must have a diameter of b = 25 mm. Determine the allowable plate width a within the nearest 5 mm. if it is to withstand an axial force of P = 25 KN.
Design a v-belt/chaon drive which limits the top speed to approximately 17 mph. The outide diameter of the drive wheel is 14 inches. A jack shaft, which rotates freely on bearing mounted in a housin
If the cold-air assumptions can be applied, determine how much power the engine produces when running at 2300 rpm.
The field-circuit resistance and armature-circuit resistance of a 10-hp 115-V motor are 90 Ohm's and 0.08 Ohm's, respectively.
A shunt motor has an armature resstence of 0.083 Ohm's and a field-circuit resistance of 125 Ohm's. Calculate the copper losses when the motor is operating ar rated conditions.
Determine the temperatures of surface 1 through 4 of the furnace cavity of example 13.3 if the entire furnace experiences a uniform heat flux corresponding to a total power of 1522 W.
After drawing a neat and clear schematic of the geometry with appropriate conditions. Calculate the mass discharged from the tank.
Determine Heat transfer required in the reheat unit (KJ/kg). If it is a 113 MW power plant, what is the required flow rate of air?
The heat transfer in the condenser, the boiler, and the reheater take place at constant pressure. The water leaves the condenser as saturated liquid.
Compare the minimum theoretical rate and the actual rate at which energy could be discharged to the cooling water and discuss.
What is the cycle efficiency if a cold-air-standard analysis is used with the following values: R = 8.314 kJ/kmol-K, cp = 1007 j/kg-K, cv = 0.720 kj/kg-K?
At what speed must they pass through the furnace to be at 600C when they leave the furnace? The heat transfer coefficient is 135 W*m^-2*L^-1.
Derive the transfer function of this system with a proportional control (Kp) with a feedback loop. Draw the system response for Kp= 1,2,3,...,10.
How far below the liquid level in the tank must the pump be to obtain this required ( NPSH)r? If the feed is at boiling point, calculate the pump position.
You have decided to design the beam with 1040 Hr Steel. Determine the minimum required diameter, if the major principal stress needs to be half of the yield stress.
A 5 ft^3 tank containing steam at 14.7 psia, 1% quality, is fitted with a relief valve. Determine the heat transfer to the tank during the process.
If you assume the power plant operates on a Carnot Cycle and the atmosphere is 20°C (assume the heat rejection occurs at constant temperature), what is the temperature of the geothermal source?
A bicycle rider rides from home along a highway and back along the same road in such a way that her distance from home at time t. What is the average speed of the rider in terms of kilometers per hou