_____ has a snout that resembles a duck's bill and is full of sharp teeth
a. Trout
b. Pike
c. Salmon
d. Minnow
b
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Air occupies a balloon that has an initial volume of 0.05 m3. Initially, the air has a temperature of 20oC and a pressure of 125 kPa. The air is heated, and the balloon expands until the volume of 0.25 m3. The pressure and volume are related through pVn = constant. Develop a computer program model for analyzing such a process/device. Plot the final temperature of the air, the work done, and the heat transfer for values of n = 1.1, 1.2, 1.3, 1.4, and 1.5.
Given: Air; T1 = 20oC = 293 K; P1 = 1000 kPa; V1 = 0.05 m3; V2 = 0.25 m3; PVn = constant Assume: ?KE = ?PE = 0. The air is an ideal gas with constant specific heats (cv = 0.718 kJ/kg-K; R = 0.287 kJ/kg-K) What will be an ideal response?
Why are positive shutoff devices used when removing gauge manifold sets from Schrader valves?
A) To reduce the release of refrigerants B) To prevent postremoval refrigerant venting C) To automatically loosen Schrader valves D) To restart the system for installation
1:1 scale is also called true or real scale.
Answer the following statement true (T) or false (F)
A source of pollution that is harder to trace, such as debris blown by the wind, is called a:
A. non-point source B. point source C. known source D. carried source