The relative humidity is 100% at the ______________ temperature
Fill in the blank(s) with correct word
dew point
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A cross-flow heat exchanger having an overall heat transfer coefficient of 150 W/m^2?K is used to heat water from 25ºC to 100ºC at 3 kg/s. Exhaust gases at 250ºC and with a specific heat of 1.0 kJ/kgK are used to heat the water, and these gases leave at 130ºC. Assume both flows are unmixed. Then determine (a) the mass flow of the exhaust gases and (b) the surface area of the heat exchanger.
What will be an ideal response?
Satellite Motion: A satellite of mass 500 kg orbits the earth with a period of 6000 s. The earth has a mass of 5.97 × 1024 kg, a radius of 6.38 × 106 m, and G = 6.67 × 10-11 N ? m2/kg2.(a) Calculate the magnitude of the earth's gravitational force on the satellite.(b) Determine the altitude of the satellite above the earth's surface.
What will be an ideal response?
A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV
What is the threshold frequency for photoelectron production? (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 6.8 × 1014 Hz B) 2.7 × 1014 Hz C) 7.6 × 1014 Hz D) 8.5 × 1014 Hz E) 9.4 × 1014 Hz
A police crime lab is trying to determine whether someone was murdered or died as a result of an accident. He was struck in the temple by a 4.20 kg sculpture that is alleged to have fallen off a bookcase. The sculpture presumably fell a distance of 1.43 m and the corner that struck him had an area of 0.250 cm2 . If the time for the sculpture to stop was 1.00 ms, the pressure on his temple, in
N/m2, was a. 8.89 × 10^4. b. 1.65 × 10^5. c. 1.65 × 10^6. d. 8.89 × 10^8. e. 1.65 × 10^9.