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Consider a horizontal 6-mm-thick, 100-mm-long straight fin fabricated from plain carbon steel (k = 57 W/m · K, s = 0.5). The base of the fin is maintained at 150°C, while the quiescent ambient air and the surroundings are at 25°C. Assume the fin tip is adiabatic.
Consider a sample of thickness L = 25 mm and a square planform of width W = 250 mm. In an experiment per- formed under steady-state conditions, temperature mea- surements made at the lower and upper surface of the sample yield values of T1 = 150°C and T2 = 100°C, respectively, for a power input of Pelec = 70 W. What are the thermal conductivity and emissivity of the sample?
an electric power distributor charges residential customers 0.10 per kilowatt-hour kwh. the company advertises that
a thin metal cylinder contains an ideal gas. the cylinder has a cross sectional area of 100 cm2. the surroundings
You must design a device that will remove the balls from the bucket, and deposit them into the box. You will have 60 seconds to remove balls.
an object with a mass of 5 kg undergoes a process during which there is heat transfer from the object at a rate of 5 kj
air in an internal-combustion engine has 227degc 1000 kpa with a volume of 0.l m3. combustion heats it to 1500 k in a
air initially at 85 kpa 900k and occupying a volume of 0.15 m3 undergoes two processes. the air is compressed
a vat holds 2.25103 kg of a 22.0 solution of ethylene glycol and water. how much must be drained from the tank and
A blue spruce pine tree has the shape of a triangle which is 15 cm off the ground. The triangle has a maximum diameter of 6 m and is 10 m tall. Estimate the drag on the tree if it is exposed to a 25 m=s wind. Use CD¼ 0.4 in your calculations.
an evacuated 150-l tank is connected to a line flowing air at room temperature 25 degree c and 8 mpa pressure. the
Use linear interpolation to estimate the specific volume in units of (volume/mass) of water
To familiarize the student with the practical aspects involved in designing fluid systems. Prepare young engineers through hands on experience in writing project technical report to execute tasks related to design practical fluid system.
a rigid insulated tank that is initially evacuated is connected through a valve to a supply line that carries helium at
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