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A structural steel W12×40 has a span length of 20 ft. The beam is fixed at one end and simply supported at the other end. Both supports are on the same level.
The beam is loaded with a concentrated load of 20,000 lb at a point 8 ft from the simply supported end. Compute the maximum bending stress in the beam.
a balloon uses hot air to provide its lifting capacity. prior to its release it is tethered to the ground by a steel
The top of the burner is exposed to room conditions (Tsur,t = Too,t = 20°C, ht = 40 W/m2 · K), while the bottom of the burner is exposed to combus to ensure adequate airflow passage through the array. Recommend a design that enhances chip cooling.
a rigid closed tank of volume 3 m3 contains 5 kg of wet steam at a pressure of 200 kpa. the tank is heated until the
a timber company wishes to increases sales of timber by supplying log cabin kits that can be assemed and used as
a refrigerator is to remove heat from the cooled space at a rate of 2300 kjmin to maintain it temperature
if the effects of atmospheric resistance are accounted for a fallinf body has an acceleration defined by the equation
Ideal vapor-compression refrigeration cycle, An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar
refrigerant 134a at 700 kpa and 40oc is expanded adiabatically in a closed system to 60 kpa. determine the work
A ski lift has a one-way length of 1495m and a vertical rise of 285 m. The chairs are spaced 23 m apart, and each chair can seat three people. The lift is operating at a steady speed of 12 km/h.
A Parshall flume is placed in a small stream to measure the discharge.
water at atmospheric pressure boils on the surface of a large horizontal copper tube. the heat ?ux is 90 of the
1. Find the de Broglie wavelength and frequency of an electron whose speed is 10% of the speed of light. Using the EM spectrum chart, what kinds of EM waves could this de Broglie wavelemgth represent? Please show all calculations and explanations!
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