A gas in a piston-cylinder assembly undergoes a process for which the relationship between pressure and volume is pV2 = constant. The initial pressure is 9 bar, the initial volume is 2 m3, and the final pressure is 4 bar. Determine the work magnitude for this process in kJ.

415. An airplane weighing 19903.13 lbf at ground is flying at an altitude of 32, 247.95 ft at 591 miles per hour. Determine the change in potential energy in hp-min

A construction crane weighing 12,000 lbf fell from a height of 500 ft to the street below during a severe storm. For g = 32.05 ft/s², determine the mass, in lb, and the change in gravitational potential energy of the crane, in ft-lbf.

An object whose mass is 90 lb is projected straight upward from the surface of the earth and reaches a height of 900 ft when its velocity reaches zero. The only force acting on the object is the force of gravity. The acceleration of gravity is g = 32.2 ft/s?. Determine the initial kinetic energy of the object, in ft-lbf, and the initial velocity of the object, in ft/s.

A gas is contained in a vertical piston-cylinder assembly by a piston with a face area of 60 in2 and weight of 100 lbf. The atmosphere exerts a pressure of 14.7 lbf/in² on top of the piston. A paddle wheel transfers 3 Btu of energy to the gas during a process in which the elevation of the piston increases slowly by 2 ft. The piston and cylinder are poor thermal conductors, and friction between the piston and cylinder can be neglected. Determine the work done by the gas on the piston, in Btu, and the change in internal energy of the gas, in Btu. Step 1 Determine the expansion work done by the gas on the piston, in Btu. Wexp = i Btu

A system of mass 12 kg undergoes a process during which there is no work, the elevation decreases by 50 m, and the velocity increases from 15 m/s to 50 m/s. The specific internal energy decreases by 5 kJ/kg and the acceleration of gravity is constant at 9.8 m/s2.Determine the change in kinetic energy, in kJ, and the amount of energy transfer by heat for the process, in kJ.

A closed system consisting of 1.3 kg of nitrogen undergoes a polytropic process according to the relation PV1.26 = constant. At initial state, the nitrogen is at a pressure of 65.0 bar and temperature of 369°C. At the final state, the nitrogen is at a temperature of 48°C. What is the work transfer for this system? Express the answer in kJ.

A gas in a piston-cylinder assembly undergoes a process during which its volume reduces from 2 m to 1 m°. During this process, the system specific volume does not change O increases twice O reduces twice

A construction crane weighing 8,000 lbf fell from a height of 400 ft to the street below during a severe storm. For g = 32.05 ft/s², determine the mass, in lb, and the change in gravitational potential energy of the crane, in ft·lbf. Part A Determine the mass, in lb. m = i lb