Farm policy has been a failure because the number of farmers has fallen from roughly 7 million when the programs began to 2.1 million today
Indicate whether the statement is true or false
FALSE
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Letter A is pointing to a _____.
a. header
b. top plate
c. sill
d. double top plate
The basic measure of the amount of light produced by a light source is called the _____.
a. incandescence b. candlepower c. footcandle d. lumen
A balloon initially contains air at 25oC and 450 kPa, with a volume of 0.10 m3. The air inside the balloon is heated and the balloon expands until the volume is 0.25 m3. The pressure and volume follow the relationship PV1.3 = constant during the process. Determine the final temperature of the air, and the amount of heat added.
Given: Air; T1 = 25oC = 298 K; P1 = 450 kPa; V1 = 0.10 m3; V2 = 0.25 m3; PV1.3 = 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?
A direct-fired make-up air unit typically achieves a combustion efficiency of _____
a. 70 percent b. 80 percent c. 90 percent d. 100 percent