The process of an edge dislocation combining with a vacancy to circumvent an obstacle is dislocation _________.
Fill in the blank(s) with the appropriate word(s).
climb
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When something is restricted to having only certain numerical values, it is said to be ________________
Fill in the blank(s) with correct word
A refrigerator has an interior volume of 0.500 m3. The temperature inside the refrigerator in 282 K, and the pressure is 101 kPa. If the molecular weight of air is 29 g/mol, what is the mass of air inside the refrigerator? (R = 8.31 J/mol × K)
A) 625 g B) 513 g C) 447 g D) 329 g E) 243 g
A turbine blade 6.3-cm-long, with cross-sectional area A = 4.6 x 10–4 m2 and perimeter P = 0.12 m, is made of stainless steel (k = 18 W/(m K). The temperature of the root, Ts, is 482°C. The blade is exposed to a hot gas at 871°C, and the heat transfer coefficient h? is 454 W/(m2 K). Determine the temperature of the blade tip and the rate of heat flow at the root of the blade. Assume that the tip is insulated.
GIVEN
FIND
ASSUMPTIONS
Steady state conditions prevail
The thermal conductivity is uniform
The tip is insulated
The cross-section of the blade is uniform
One dimensional conduction
SKETCH
Which of these is impossible, by the second law of thermodynamics?
A. An engine that generates electricity by extracting heat from cold water and dumping waste heat to warmer air B. A single match carelessly discarded causes 1500 acres of woodland to burn C. Using heat exhausted by a refrigerator to cook a meal D. Water evaporating from a lake and then condensing to form clouds