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A 2.5-cm-OD hot steam line at 100°C runs parallel to a 5.0 cm OD cold water line at 15°C. The pipes are 5 cm center to center and deeply buried
A 2-mm-thick layer of water on an electrically heated plate is maintained at a temperature of Tw = 340 K, as dry air at T8 = 300 K flows over the surface
A 1.4-kg aluminum household iron has a 500 W heating element. The surface area is 0.046 m2. The ambient temperature is 21°C and the surface heat transfer
A 1-cm-thick, 1-m-square steel plate is exposed to sunlight and absorbs a solar flux of 800 W/m2. The bottom of the plate is insulated, the edges are maintained
A 2 m x 2 m vertical plate is exposed on one side to saturated steam at atmospheric pressure and on the other side to cooling water that maintains a plate
A 2-mm-diameter electrical wire is insulated by a 2-mm-thick rubberized sheath (k = 0.13 W/m · K), and the wire/sheath interface is characterized by a thermal
A 20-mm diameter sphere is suspended in a dry air stream with a temperature of 22°C. The power supplied to an embedded electrical heater within the sphere
A 25-mm-diameter copper sphere with a low emissivity coating is removed from an oven at a uniform temperature of 85°C and allowed to cool in a quiescent fluid
A 40-mm-Iong, 2-mm-diameter pin fin is fabricated of an aluminum alloy (k = 140 W/m2 · K).
A 25-mm-diameter, high-tension line has an electrical resistance of 10- 4 n/m and is transmitting a current of 1000 A.
A 0.3-cm thick aluminum plate has rectangular fins on one side, 0.16 A=0.6 cm, spaced 0.6 cm apart. The finned side is in contact with low pressure air at 38°C
1n a manufacturing process, stainless steel cylinders (AISI 304) initially at 600 K are quenched by submersion in an oil bath maintained at 300 K
When a valve is opened, fluid flows in the expansion duct of Fig. according to the approximation
When floating in water (SG = 1), an equilateral triangular body (SG = 0.9) might take two positions, as shown at right. Which position is more stable?
Wind at U8 and p8 flows past a Quonset hut which is a half-cylinder of radius a and length L (Fig). The internal pressure is pi.
When a gravity-driven liquid jet issues from a slot in a tank, as in Fig an approximation for the exit velocity distribution is u˜ 2g (h-z)
When a sea-level air flow approaches a ramp of angle 20°, an oblique shock wave forms as in Figure. Calculate
When a Pitot tube such as Fig is placed in a supersonic flow, a normal shock will stand in front of the probe.
When a jet strikes an inclined plate, it breaks into two jets of equal velocity V but unequal fluxes aQ at (2) and (1 - a) Q at (3), as shown
When a line source-sink pair with m = 2 m2/s is combined with a uniform stream, it forms a Rankine oval whose minimum dimension is 40 cm, as shown
A 0.20-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C
When fluid in a pipe is accelerated linearly from rest, it begins as laminar flow and then undergoes transition to turbulence at a time ttr
When a microorganism moves in a viscous fluid, inertia (fluid density) has a negligible influence on the organism's drag force. These are called creeping flows
Weightless gate AB is 5 ft wide into the paper and opens to let fresh water out when the ocean tide is falling.
Water flows full in an asphalt half hexagon channel of bottom width W. The flow rate is 12 m3/s. Estimate W if the Froude number is exactly 0.6.