The interval from one standard deviation below the mean to one standard deviation above the mean contains approximately ______% of the measurements.
Fill in the blank(s) with the appropriate word(s).
68%
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Which of the following is not usually an insurable loss?
A. Electrostatic discharge B. Severe windstorm C. Fire D. Lightening
Saturated water with a quality of 0.25 and a temperature of 300°F enters an uninsulated diffuser at a velocity of 510 ft/s. The mass flow rate is 5.2 lbm/s.
(a) If the water is to exit as saturated water vapor at a temperature of 300°F, with a velocity of 25 ft/s, determine the necessary heat transfer rate. (b) Using your model of a diffuser, determine the necessary heat transfer rates for the flow to exit as a saturated substance with qualities ranging from 0.40 to 1.0. (c) Using your model of a diffuser, determine the necessary heat transfer rates for the flow to exit as a saturated vapor at 300°F, with exit velocities ranging from 0 ft/s to 300 ft/s. Given: Water: x1 =0.25; T1 = 300°F; V1 = 510 ft/s; x2 = 1.0; T2 = 300oF; V2 = 25 ft/s;m?=5.2 lbm/s What will be an ideal response?
When used in a dehumidification application, the purpose of a heat pipe heat exchanger includes _____.
a. removing latent heat from the air supply b. pre-cooling the air entering the evaporator c. preheating the air entering the evaporator d. providing emergency heat if the compressor fails
Three capacitors, a 12 ?F, a 20 ?F, and a 30 ?F, are connected in parallel to a 400 Hz source. What is the total XC?
A. 6.42 ? B. 42.78 ? C. 44.09 ? D. 56.32 ?