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The half-cylinder has k =20W/m· ?C and is exposed to the convection environment at 20?C. The lower surface is maintained at 300?C. Compute the temperatures for the nodes shown in Figure P3-66 and the heat loss for steady state. Repeat Problem 3-67 with the inside of the tube exposed to a convection condition with h=40 W/m2 · ?C. Check with an analytical calculation
a pulley of moment of inertia i is fixed on a shaft of polar second moment of area j and shear modulus g. the shaft is
water is used in a regenerative power cycle where the standard rankine cycle is augmented with one closed feed water
Estimate the speed of fall of a 6-ft man with arms and legs outstretched. Make reasonable assumptions. Now give the man a 6-m-diameter parachute and calculate his speed of descent, again making reasonable assumptions.
describe possible methods that can be used to separate materials such as polymers, aluminium alloys and steels from one another.
25 mw power is produced in a well-insulated steam turbine operating at steady state. the flow rate of steam through the
air at 1 atm and 30 degc flows over a 15 cm square plate at a velocity of 10 ms.a. calculate the maximum boundary layer
The data listed below are claimed for a power cycle operating between hot and cold reservoirs at 1500 K and 450 K, respectively. For each case, determine whether the cycle operates reversibly, operates irreversibly, or is impossible.
a high-strength steel has a yield strength of 1510 mpa and a k ic of 93 mpa-m12. calculate the smallest size of a
calculate the center to center distance between adjacent atoms of tungsten along the following directionsa- 100 b- 101
helium gas in an ideal otto cycle is compressed from 12c and 2l to 0.25l and its temperature increases by an additional
a small water droplet of diameter d100 micro meter and temperature tmp 0 deg c falls on a nonwetting metal surface
A compressed liquid mixture of 42 mol percent n-hexane (1) and 58 mol percent ethane (2) is to be fed to a flash tank where the pressure is reduced and a liquid and vapor stream separated. The flashing operation will be carried out at 32°C.
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