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A slow leak developed in a tire (assume constant volume), in which it takes 3 hr for the pressure to decrease from 30 psig to 25 psig. The air volume in the tire is 0.5 ft3, and the temperature remains constant at 60 oF. The mass flow rate of the air is given by m=0.68pA/?(RT). Calculate the area of the hole in the tire. Atmospheric pressure is 14 psia.
q1 the pressure in an air tank is able to support a water column 15 meter high. find the absolute air pressure in psi
a cylindrical tank measuring 0.75 m in diameter and 1.2 m high contains a transformer immersed in an oil bath that
A first class lever in static equilibruim has a 50 lb resistance force and 15 lb effort force. The lever's effort force is located 4 ft from the fulcrum. What is the actual mechanical advantage of the system?
Calculate the percent energy distribution for a steam generator among the following categories: (i) steam, (ii) flue gas losses, (iii) carbon loss in ash (refuse loss), and (iv) miscella- neous heat transfer loss. The steam generator receives 480 sho..
a constant velocity 20msec horizontal water jet from a stationary nozzle exit area 0.5 msec impinges normally on a
a 10-kg block is attached to spring a and connected to spring b bycord and pulley. the block is held in the position
a long cylinder of radius ro20cm and thermal conductivity k3 wmk is immersed in a fluid of convection coefficient
A meteorologist uses a pitot -static tube to measure the wind speed in a tornado. Based on the damage caused by the storm, the tornado is rated as EF5 on the enhanced Fujita Scale. This means that the wind speed is estimated to be in the range of 261..
an adiabatic heat exchanger is used to heat cold water at 8 deg c entering at a rate of 3kgs by hot air at 150 deg c
A 10-lb block has an initial velocity of 10 ft/s on a smooth, horizontal plane. A force, F = (2.5 t) lb, where t is in seconds, acts horizontally on the block in its direction of motion. Determine an expression for the distance, s in terms of time, t
A frictionless piston-cylinder contains H2O initially at 1000 kPa and 200C. The system is slowly cooled at constant pressure to 20C. Determine the temperature at which you would expect two phases to exist. Calculate the work for the entire process
A vertical piston-cylinder device, which is insulated, initially contains 15 kg of water, 9 kg of which is in the vapor phase. The pressure inside the cylinder is maintained constant at 0.3 MPa by mass of the piston. Now steam at 0.8 MPa and 500 °C i..
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