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Assume no frictional losses and recognize that the pressure at the top and bottom of the sprue is atmospheric. What diameter should be specified at the bottom of the sprue to prevent aspiration?
Define Mach number and determine the type of speed an aircraft is flying if the aircraft speed is 880 mph at an altitude of 3500 ft where the temperature is 40 degree F.
Calculate the change in specific internal energy and enthalpy of air for a process starting at 250 K and ending at 500 K. Assume air is behaving as an ideal gas with constant specific heats.
what is the temperature and pressure of the Oxygen within the piston-cylinder system? Assume Oxygen behaves as an ideal gas.
Determine the amount of heat that needs to be added to bring the cake and the pan to the over temperature (when it is fully baked).
Determine the rate of heat transfer out from the condensing steam as it passes through the condenser, in MW. Discuss the effects of reheat on the vapor power cycle.
How much energy (kJ) is needed to accelerate an 1800 kg vehicle from 10 km/h to 30 km/h? Assume that the acceleration takes place over a 10 second time period.
What is the possible power (kW) production from a 32 m radius wind turbine if the average wind speed is 12 m/s? Assume an ambient air density of 1.20 kg/m3.
Consider a well sealed, well insulated room with a common household refrigerator/freezer unit. What type of energy crosses the room boundary?
A particle is moving with a velocity of Vo when s=0 and t=0. If it is subjected to a deceleration of a = (-K)v^3, where K is a constant, determine its velocity and position as functions of time.
The amount of energy required to bring the vehicle to a stop is 600 KJ. Can you calculate the speed at which the brakes began in km/hr?
It is known that tha initial velocity vector akes an angle of 30 degre anglewith the horizontal. Determine the range of launch of speeed v0 for which the ball will land inside the box?
How thick does the 4140 steel need to be if it is a cyclander with a diameter of 8.252 inches and is 1.5 inches deep and overall thickness is 2.0 inches.
Determine (a) the thermal efficiency of the cycle, (b) the mass flow rate of steam, in kg/h, (c) the rate of heat transger out from the condensing steam as it passes through the condensor, in MW.
Calculate the specific volume for carbon dioxide gas at 450 K and 4000 kPa using (a) ideal gas equation, (b) compressibility chart, and (c) van der Waals equation.
Determine the volume of the tank, in m^3, and the final pressure, in bar. Also, show the process on both a P-v and T-v diagram.
Combustion heats it to 1500 K in a constant-volume process. What is the mass of air (lbm), and how high does the pressure become (psia)? Show the process on both a P-v and T-v diagram.
The cooling continues to -10 degrees celcius (state 3). Show the processes 1 to 2 and 2 to 3 on one P-v and one T-v diagram.
The ultimate strengths in tension and compression are 210 and 500 MPa respectively. Determine the factor of safety based on the MPS theory.
If the collar starts from rest at A under the action of the constant 2.9-lb horizontal force, calculate its velocity v as it hits the stop at B.
Compute the minimum possible radius of the specimen without fracture, given that the applied load is 5560 N (1250lbf), the flexural strength is 105 MPa (15,000psi).
Heat is transferred to the tank in order to maintain constant temperature. Determine the heat transfer to the tank when half of the contents of the tank has been removed.
The maximum allowable shear stree tallow in the wall of the cylinder is 42 Mpa. What is the minimum permissible thickess tmin of the cylinder wall?
Briefly explain (a) why there may be significant scatter in the fracture strength for some given ceramic material, and (b) why fracture strength increases with decreasing specimen size.
Find the actual and Carnot thermal efficenciencies of this heat engine. How much power does the heat engine produce?