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An object of mass 4 kg stretches a spring 0.2m. The object is set in motion with an initial velocity of 1 m/s downward from the equilibrium position and the force of the air resistance is 10 times t
A slender rod is at rest in vertical position, with lenght of 1.5m. then a force of 50 N. is applied at the bottom tip. Determine the initial angular acceleration of the rod and the acceleration of
A piston-cylinder device initially contains 0.35-kg steam at 3.0 Mpa, 240 degrees Celcius. The steam loses heat to the surroundings and the piston moves down, hitting a set of stops at which point t
A vehicle is to be propelled by a jet of water, inclined 15 degrees, impinging on a vane as shown in figure 16.16. the jet has a velocity of 30 m/s and issues from a nozzle with a diameter of 200 mm
The cannon's bore is 1.5 m long. Find delta t, the time that the cannonball takes to travel through the cannon, as well as the final velocity of the boat.
Sketch the root locus for teh characteristic equations of the system for which and determine the value of the root locus gain for which the complex conjugate poles have a damping ratio of 0.5.
The ammonia is then cooled until its pressure drops to 10 lbf/in^2. Determine its entropy change from the initial state to the final state.
Determine the total electrical work the heat pump can consume on that day. If the heat pump consumes 6.6kW of power while operating, how long the heat pump ran on that day?
A water cooled spherical object of diameter 10 mm and emissivity 0.9 is maintained at 4000C. What is the net transfer rate from the oven walls to the object?
A solid aluminium sphere of emissivityε is initially at an elevated temperature and is cooled by placing it in chamber. The walls of the chamber are maintained at a lower temperature and a c
An axial flow compressor stage has blade root,mean and tip velocities of 150,200 and 250 m/s. The stage is to be designed for a stagnation temperature rise of 20K and axial velocity of 150 m/s, both
In moles of an ideal gas A and (1-n)moles of an ideal gas B, each at 1 atm, are mixed at total constant pressure. what ratio of A to B in the mixture maximizes the decrease in the Gibbs free energy
A large stationary Brayton cycle gas-turbine power plant delivers a power output of 100 MW to an electric generator. The minimum temperature in the cycle is 300 K, and the maximum temperature is 160
A Brayton cycle inlet is at 300 K, 100 kPa and the combustion adds 670 kJ/kg. The maximum temperature is 1200 K due to material considerations. What is the maximum allowed compression ratio?
Steam leaves a power plant steam generator at 3.5 MPa, 400°C, and enters the turbine at 3.4 MPa, 375°C. The isentropic turbine efficiency is 88%, and the turbine exhaust pressure is 10 kPa.
The outlet is discharging water to the atmosphere. Disregarding the frictional effects, determine the force exerted on the bolts due to the water flow?
A small steam power plant has a boiler exit of 3 MPa, 400°C while it maintains 50 kPa in the condenser. All the components are ideal except the turbine which has an isentropic efficiency of 80%
Determine how much mass must be added to or removed from the counterweight to maintain balance when the hole at the bottom is opened.
A steam power plant has a high pressure of 5 MPa and maintains 50°C in the condenser. The boiler exit temperature is 600°C. All the components are ideal except the turbine which has an actua
The refrigerant R-22 is used as the working fluid in a conventional heat pump cycle. Saturated vapor enters the compressor of this unit at 50 F; its exit temperature from the compressor is measured
The system is allowed to come to equilibrium. Determine the final temperature in °C, the entropy change for the copper vessel and each of the liquid water masses, and the amount of entropy produ
Helium gas in an ideal Otto cycle is compressed from 12C and 2L to 0.25L, and its temperature increases by an additional 800C during the heat addition process. Calculate the temperature of the heli
The turbine is adiabatic, and kinetic and potential energy changes are negligible. If the isentropic turbine efficiency is 75%, determine the work per unit mass flow in KJ/kg, and plot on an h-s dia
Determine the exit temperature of the oil, and the entropy generation of the heat exchanger. If instead of making this calculation, you had measured the exit temperature of the oil at 300K
A supply of steam at 100 kPa, 150°C is needed in a hospital for cleaning purposes at a rate of 15 kg/s. A supply of steam at 150 kPa, 250°C is available from a boiler and tap water at 100 kP