Progesterone plays a major role in the sexual behavior of male dogs
A. True
B. False
B
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A 1530 MW bituminous coal-fired wet-bottom plant emits mercury into the atmosphere. The EPA AP-42 emission factor for the power plant is 16 lb of Hg per 1012 btu. The plant operates around the clock, 365 days a year, 24 hours per day. The 20 m3/s (actual) of exhaust from the plant exits the 2-mdiameter stack at 700°C. The stack is 50 m high. The air pressure within the stack is essentially equal to the ambient air pressure of 1 atm. The average ambient temperate measured at the stack height is 20°C. The average temperature measured at 110 m on a nearby radio tower is 18.5°C. The prevailing wind speed is 3 m/s. Determine:
a. The mass emission rate of Hg in units of mg/s b. The plume rise from the stack in m c. The maximum ground-level pollutant concentration (mg/m3) from an elevated source in ppm d. The concentration of mercury 2 km directly downwind from the power plant. Calculate the concentration at ground level for gaseous pollutants that are not absorbed by the ground. What will be an ideal response?
The intensity of an electrical current is measured in _____________.
Fill in the blank(s) with the appropriate word(s).
The capacitor initially behaves like a short circuit because there is a current but there is (are) no _________ present
A. dielectric material B. voltage C. plates D. electric fields
What is the difference between the way a self-threading and a self-drilling sheet metal screw is used?
A) Self-threading screws must have a pilot hole. B) Self-threading can only be installed with a counterclockwise rotation. C) Self-drilling can only be installed with a counterclockwise rotation. D) Self-drilling screws must have a pilot hole.