Name the layers of the Earth's atmosphere, going up from the surface
What will be an ideal response?
troposphere, stratosphere, mesosphere, ionosphere
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Predict the nucleate-boiling heat transfer coefficient for water boiling at atmospheric pressure on the outside surface of a 1.5-cm-OD vertical copper tube 1.5-m-long. Assume the tube-surface temperature is constant at 10 K above the saturation temperature.
GIVEN
? Water boiling at atmospheric pressure on the outside surface of vertical copper tube
? Tube outside diameter (D) = 1.5 cm = 0.015 m
? Tube length (L) = 1.5 m
? Tube surface temperature above saturation temperature (?Tx) = 10 K
FIND
? The nucleate-boiling heat transfer coefficient (hb)
ASSUMPTIONS
? The water is at saturation temperature
SKETCH
PROPERTIES AND CONSTANTS
From Appendix 2, Table 13, for saturated water at 1 atm (Tsat = 100°C)
Given that the acceleration due to gravity on Mars is 3.7 m/s2, what is the gravitational field near Mar's surface?
A. 3.7 N/kg B. 3.7 N/kg up C. 3.7 N/kg down D. 10 N/kg down
The background microwave radiation, discovered in 1965 by Penzias and Wilson, has its peak intensity at a wavelength of 1.06 mm
What blackbody temperature does this wavelength imply for the universe? (? = 5.670 × 10-8 W/m2 • K4, Wien displacement law constant is 2.90 × 10-3 m • K) A) 0.00°C B) 0.0027 K C) -2.7°C D) -270°C E) 2.7°C
Intensity: Which one of the following expressions is the correct representation for the speed of light in vacuum?
A. 
B. 
C. 
D. 1 / 
E. 1 / ?0?0