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A windmill is operating in a 10 m/s wind that has a density of 1.2 kg/m^3. Assume that the velocity distributions are uniform and the air is incompressible. Determine the thrust force on the windmill.
Assuming ideal gas behavior, show the process on a P-v diagram and calculate the thermal efficiency of the cycle, where thermal efficiency is defined as the net work out divided by the heat in.
What are the differences between three-point bending tests and four-point bending tests? Is the data suitable for characterizing the tensile properties of an alumina cermamic, and why? What tests wo
If the coefficient of restitution between A and B is e, determine the velocity of the plate just after collision. The spring has a stiffness k.
Determine the velocity of each block just after collision and the distance between the blocks when they stop sliding. The coefficient of kinetic friction between the blocks and the plane is Uk=0.3.
Use CES to make an E-Tm chart for metals and estimate a line of slope 1 through the data for the metals. Use this line to estimate the elastic modulus of cobalt, given that it has a melting point of
A heat engine operates between two reservoirs, one at 1000 C and the other at 300 C. For every heat interaction of 1 kJ with the high-temperature reservoir, it rejects 0.6 kJ into the lowtemperature
Determine the external reactions on the x and y directions needed to hold the fixed vane, which turns the free oil jet in a horizontal plane v1=18m/s. v2=17m/s and Q=.15m^3/s.
If the earned value is right on schedule but the actual expenses are $9,000, what are the cost and schedule variances? What are the three indexes, the ETC, and the EAC? Use the proportionality rule.
A geothermal power plant uses geothermal liquid water (assume saturated liquid) at 150 °C at a rate of 210 kg/s as the heat source. Determine the exergy of the geothermal water entering the plant
Draw sketches to clarify your answer. Are the data suitable for truly characterizing the tensile properties of the material? Why? What test or tests would be better?
What is the maximum power that can be dissipated from the surface without causing damage to the electronics, which would occur at an average surface temperature exceeding 50 degree C?
Determine the volume flow rate in m^3/s, at the engines inlet and the mass flow rate in kg/s, at the engines exit assume no mass accumulation inside the engine.
Determine the mass of air that has escaped to the room from the tank. Assume that the flow of methane is one directional and there is no air in the tank when STP density is reached.
The right angle uniform slender bar AOB has mass m. Assuming a freely hinged pivot O, determine the magnitude of the normal force at A and the magnitude of the pin reaction at O.
Steam enters a turbine operating at a steady state at 8 MPa and 700 °C. Determine the rate of heat transfer from the turbine to the environment in kW.
One kilogram of water contained in a piston-cylinder assembly, initially at 160 °C, 150 kPa, undergoes an isothermal compression process to saturated liquid.
The membreane then ruptures and heat transfer takes place with the surrounding until the air comes to a uniform state at 50degC. Calculate the final pressure and the heat transferred in the process.
A frictionless piston-cylinder device with a set of stops contains .5m^3 of saturated H2O at 200 kPa. Calculate the sign and magnitude of the work done and the heat transferred in this process.
Determine the change in momentum in each vehicle. If the time of deceleration of vehicle 2 during the collision is 0.15 seconds determine the average force acting on the vehicle during this time.
The component sits stationary awaiting packaging. Determine the force exerted by the component, of mass 4g, downward on the conveyor as it sits at the buffer.
The conveyor section length is later modified and extended by a further 1.5m, Determine the new velocity of the components when they reach the buffer.
Would the required internal temperature be higher or lower if the same balloon were at higher elevation where p(infinity) was lower than used in (a)?
The membrane is removed and the system returns to equilibrium. Find the pressure at the final state and the internal energy change, if the temperature at the final state is 200 C.