The relative humidity is 100% when
a. the psychrometer wet-bulb temperature is depressed.
b. the actual moisture content is equal to the maximum moisture capacity.
c. the air temperature is above the dew point temperature.
d. the air temperature is 100°F.
b
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A rod is 2.40 m long and has a diameter of 2.50 mm. A force of 2000 N is applied to the end to stretch the rod by 1.00 mm. What is the tensile modulus for this rod?
a. 
b. 
c. 
d. 
e. 
Why are the temperature fluctuations observed in the cosmic microwave background are important?
What will be an ideal response?
Which of the following statements accurately describe a general distinction between the terrestrial planets (Mercury, Venus, Earth, Mars) to the jovian planets (Jupiter, Saturn, Uranus, Neptune)?
a. The jovian planets are much more massive. b. The terrestrial planets have a much greater average density. c. The terrestrial planets are rocky, and the jovian planets are composed of hydrogen, helium and hydrogen compounds. d. All of the above.
At one instant a heavy object in air is moving upward at 50 m/s. One second later its speed is approximately
A) 40 m/s. B) 50 m/s. C) 55 m/s. D) 60 m/s.