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A bug is on the rimof a disk of diameter 13 in that moves from rest to an angular speed of 70 rev/min in 5.2 s. What is the tangential acceleration?
What percentage of the electrons originally in the cube was removed? (b) By what percentage has the mass of the cube decreased because of this removal?
Estimate the temperature (in oC) to which the block must be heated, so that the hole and cylinder have the same diameter.
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.
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 25-hp 240-V 77.8-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.
After drawing a neat and clear schematic of the geometry with appropriate conditions. Determine the heat transfer to the tank during the process.
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.
Compare the minimum theoretical rate and the actual rate at which energy could be discharged to the cooling water and discuss.
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.
If the furnace is 5m in length and the rods enter at 50C, at what speed must they pass through the furnace to be at 600C when they leave the furnace?
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?
Consider a steam power plant with reheat that operates on a modified Rankine cycle. Sketch the cycle on a T-s diagram. Label all points and processes.
Consider a gas turbine with turbine staging and reheating. It operates under the following conditions. Determine Heat transfer required in the reheat unit (KJ/kg)
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 bicycle rider rides from home along a highway and back along the same road in such a way that her distance from home. What is the average speed of the rider in terms of kilometers per hour?
If the heating value of the natural gas fuel is 45000 kj/kg, determine the amount of the natural gas fuel burned in kg per day (24 hours).
if cooling is to be accomplished by cooling water and the cooling water temperature gain is to be 15 F, calculate the mass flow rate of the cooling water required in lbm/s.
Calculate the isentropic work (process 1-2s), the actual work (process 1-2), and the isentropic effiecency for the compressor.
Finally, 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
Find the power to the air and how much air should be flowed to the cooling tower (kg/s) if its temperature cannot be increased more than 10°C.