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A horizontal tube of 12.5-mm diameter with an outer surface temperature of 240°C is located in a room with an air temperature of 20°C. Estimate the heat transfer rate per unit length of the tube due to free convection.
you are to select a refrigerator for frozen food processing facility. the freezing of the food requires a heat rate of
A 400 L rigid tank contains 5 kg of air at 25 C. Determine the reading on the pressure gauge if the atmospheric pressure is 97 kPa.
Initially open and at rest,the door is struck at its center by a handfuIof sticky mud w ith mass O.5 kg, travelling perpendicular to the door at 12.0 m/s just before impact. Find the final angular speed of the door.
the density of atmospheric air is about 1.15 kgm3which we assume is constant. how large an absolute pressure will
cylinder a and cylinder b contain 0.07 grams of helium and 0.4 grams of oxygen respectively. each of these gases is
a converging-diverging nozzle has a design mach number of 2.0 . the stagnation pressure at the nozzle inlet is 100
a circular bar of radius r 1 cm is placed horizontally between two vertical supports that are separated by distance l
the change in diameter 2.5 in. of a large steel bolt is carefully measured as the nut is tightened. knowing that e 29 x
a large supply line at 350 k and 0.5 mpa is connected to the inlet of a well-insulated 0.002 m3 tank. the tank has mass
an air standard brayton closed cycle receives air at 1 atm and 298 k. the upper temperature and pressure limits are 5
Tankless microwave water heating systems have been introduced that not only quickly provide hot water but also significantly reduce the exergy destruction inherent in domestic water heating with conventional electrical and gas- fueled water heater..
How many equations do you think are needed to describe this system mathematically? If the system ever came to rest, what would be the deflection of the spring?
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