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An insulated piston-cylinder device initially contains 0.3 m3 of carbon dioxide at 200 kPa and 27 ºC. An electric switch is turned on, and a 110-V source supplies current to a resistance heater inside the cylinder for a period of 10 min. The pressure is held constant during the process, while the volume is doubled. Determine the current that passes through the resistance heater.
the inner and outer surfaces of a 6-m x 7-m brick wall of thickness 41 cm and thermal conductivity .69 wmc are
Calculate reactions of a simply supported continuous beam. A beam is simply supported at the ends and is continuous over two spans.
an airplane wing modeled as a spring-mass system with natural frequency 40 hz is driven harmonically by the rotation of
two blocks a and b are arranged with pulleys as shown. block a has an initial velocity t 0s to the left of va1.2 ms.
water is the working fluid in a cogeneration cycle that generates electricityand provides heat for campus buildings.
A piston-cylinder device contains 0.8kg of steam at 300 degrees C and 1 MPa. Steam is cooled at constant pressure until one-half of the mass condenses.
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
If an automobile's braking distance from 100 km/h is 60 m on level pavement, determine the automobile's braking distance from 100 km/h when it is (a) going up a 60 incline, (b) going down a 2-percent incline.
Consider a NACA 0009 airfoil that has a plain flap whose length is 0.2c and which is deflected 25. a. Calculate cl and cmc/4 When the geometric angle of attack is 4 degrees, what is the section lift coefficient? Where is the center of pressure?
what does it mean when a steel cable is required to have a factor of safety of at least 5 against its ultimate load?
a stone is thrown vertically upward from a point on a bridge located 40 m above the water. knowing that it strikes the
A 5v belt drive system operates an input speed of 1250 RPM at the small sheave. The driving sheave has a pitch diameter of 6.000 in, and the driven sheave has a pitch diameter of 19.000 in. If an optimum center distance of 47 in is specified.
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