Two kilograms of air is expanded in a piston-cylinder arrangement at a constant pressure of 600 kPa from a volume of 0.1 m3 to a volume of 0.3 m3. Then the temperature is then held constant during an expansion to 0.5 m3. The total work done by the air is nearest:
A) 119 kJ
B) 132 kJ
C) 151 kJ
D) 189 kJ
B) 132 kJ
The temperature at state 2 is T2 = P2V2 /mR = 600×0.3 / (2×0.287) = 314 K. The work is then
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When responsible duck hunters of the wetlands realized their leftover lead shot was killing birds, they
replaced that lead shot with _____ shot.
a. steel c. rubber b. copper d. titanium
Other things being equal, a soil with 30% clay of the ________ type would be expected to have the greatest phosphorus -fixing capacity
A) 2:1 B) crystalline iron oxide C) 1:1 D) allophanic
The recommended diameter of the inductive proximity sensor head is twice the width of the target.
Answer the following statement true (T) or false (F)
The resistive elements of fuses, lightbulbs, heaters, etc., are non-linear (i.e., the resistance is dependent on the current through the element). Assume the resistance of a fuse (Figure P2.45) is given by
R0 = 0.11?; and P is the power dissipated in the resistive element of the fuse. Determine the rated current at which the fuse will melt (that is, “blow”) and thus act as an open-circuit.
(Hint: The fuse blows when R becomes infinite.)
Find:
The rated current at which the fuse blows, showing that this happens at:
Assumptions:
