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Consider a 1500 kg vehicle traveling at some unknown velocity and suddenly the brakes are applied and the vehicle is brought to a stop. Assume that the braking takes place over a 15 second time period, on level ground, and that you can neglect aerodynamic drag and tire friction. 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?
a 20 mw radial flow hydraulic turbine is to be designed with a head of 70 m and a speed of 90 rpm. a geometrically
an insulated rigid tank with a volume of 10ft3 is connected by a valve to a supply line containing steam at 500 psia
a rectactangular surface is placed in a vertical position in fresh water with its top and bottom edges horizontal. if
a piston-cylinder device initially contains 1.4 kg of refrigent-134a at 140 kpa and 20 degc. heat is now transferred to
a positively cambered airfoil with a zero-lift angle of attack of ?3has a lift slope of 0.1 per degree.a. calculate the
B) Determine the minimum amount of work [kJ ] required to reach this end state. C) If more than the minimum work is actually used, where does this extra energy go? That is what becomes of the extra energy?
it is highly desirable to make benzene from ethane from shale gas in a continious vapor-phase reaction3c2h6 --gt c6h6
a pressurized water tank is used as a source of water for a fire hose. the pressure of the air in the top of the tank
consider the sysstem shown in figure 3-45 where m 2 kg b 4 nxm and k 20 nm. assume that x0 0.1 m and xdot0 0. the
a civil engineer must design a wheelchair accessible ramp next to a set of steps leading up to a building. the height
Derive at least four concept designs to satisfy the given specification - draw a central cross-section of the heat exchanger
a heat engine working on carnot cycle converts 25% of heat into work when the temperature of the sink is reduced by 353 k the efficiency gets doubled .find the temperature of source and sink.
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