Liquid nitrogen at 77.2 K (its saturation temperature) and 100 kPa is in a well-insulated flask having a surface temperature of 100 K. Estimate the convection heat transfer coefficient between the liquid nitrogen and the flask surface. The critical pressure of nitrogen is 33.54 atm.
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Using Mostinski’s Equation 10-4 with 10-5 and Mathcad for the computations
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A thin sheet of plastic (n = 1.60) is inserted between two panes of glass to reduce infrared (? = 700 nm) losses. What thickness (in nm) is necessary to produce constructive interference in the reflected infrared radiation?
a. 218 b. 109 c. 55 d. 318 e. 443
Two identical cars are traveling around the same curve on a highway. One of them is moving at 60 mph, and the other is moving at 30 mph. The centripetal force acting on the car moving at 60 mph is __________ the value of the centripetal force acting on the car moving at 30 mph
a. one quarter b. one half c. the same as d. twice e. four times
The Milky Way galaxy has a rotation curve that:
A. decreases rapidly with increasing radius in the disk, indicating the presence of dark matter. B. stays constant out to large radii in the disk, indicating the presence of dark matter. C. increases drastically with increasing radius. D. decreases rapidly with increasing radius in the disk, indicating no dark matter is present. E. stays constant out to large radii in the disk, indicating that no dark matter is present.
Compare the weather visible on the disks of Jupiter and Saturn
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