A starting mixture of _____ percent concentrates and _____ percent roughage may be used for cattle
that have been creep fed grain or have had grain on grass pastures
a. 80, 20 c. 50, 50
b. 20, 80 d. 50, 40
A
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Carbon at 1273 K is contained in a 7-cm-inner-diameter cylinder made of iron whose thickness is 1.2 mm. The concentration of carbon in the iron at the inner surface is 0.5 kg/m3 and the concentration of carbon in the iron at the outer surface is negligible. The diffusion coefficient of carbon through iron is 3 × 10?11 m2/s. The mass flow rate of carbon by diffusion through the cylinder shell per unit length of the cylinder is
(a) 2.8?×?10?9 kg/s (b) 5.4?×?10?9 kg/s (c) 8.8?×?10?9 kg/s (d) 1.6?×?10?8 kg/s (e) 5.2?×?10?8 kg/s
Which is NOT a criteria the EPA uses to define used oil?
A) Color B) Use C) Contaminants D) Origin
In a four stroke cycle diesel engine, when is fuel injected into the cylinder?
A. At the end of the compression stroke and the beginning of the power stroke. B. During the compression and exhaust strokes . C. Only when the piston is at TDC in the compression stroke. D. Only during the power stroke.
Find the numerical values of the literal constants.
