Why do Uranus and Neptune appear bluish?
What will be an ideal response?
Methane absorbs red light, and is common in their atmospheres.
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A solution with a boiling point of 82°C boils on the outside of a 2.5 cm tube with a No. 14 BWG gauge wall. On the inside of the tube flows saturated steam at 40 kPa(abs). The convection heat transfer coefficients are 8.5 kW/(m2 K) on the steam side and 6.2 kW/(m2 K) on the exterior surface. Calculate the increase in the rate of heat transfer if a copper tube is used instead of a steel tube
GIVEN
• Tube with saturated steam on the inside and solution boiling at 82°C outside
• Tube specification: 1 in. No. 14 BWG gauge wall
• Saturated steam in the pipe is at 40 kPa(abs)
• Convective heat transfer coefficients
? Steam side ( ci h ) : 8.5 kW/(m2 K)
? Exterior surface ( co h ) : 6.2 kW/(m2 K)
FIND
• The increase in the rate of heat transfer for a copper over a steel tube
ASSUMPTIONS
• The system is in steady state
• Constant thermal conductivities
SKETCH
The United States is one of the least expensive places to build a power facility
What will be an ideal response?
1.0 kilometer equals ___________ nanometers.
a. 
b. 
c. 
d. 
Instructions: On occasion, the notation 
= [A, ?] will be a shorthand notation for 
.
The rectangular coordinates of a point are (5.00, y) and the polar coordinates of this point are (r, 67.4°). What is the value of the polar coordinate r in this case?
A. 1.92 B. 4.62 C. 12.0 D. 13.0 E. More information is needed.