The concept of uniformitarianism was developed by ______________, the "father of geology."
Fill in the blank(s) with correct word
Hutton
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Air at 16°C and atmospheric pressure enters a 1.25-cm-ID tube at 30 m/s. For an average wall temperature of 100°C, determine the discharge temperature of the air and the pressure drop if the pipe is (a) 10-cm-long and (b) 102-cm-long.
GIVEN
• Atmospheric air flowing through a tube
• Entering air temperature (Tb,in) = 16°C
• Tube inside diameter (D) = 1.25 cm = 0.0125 m
• Air velocity (V) = 30 m/s
• Average wall surface temperature (Ts) = 100°C
FIND
The discharge temperature (Tb,out) and the pressure drop (?p) if the pipe length (L) is
(a) 10 cm (0.1 m) (b) 102 cm (1.02 m)
ASSUMPTIONS
• Steady state
• The tube is smooth
SKETCH
for dry air at the entering bulk temperature of 16°C
Density (?) = 1.182 kg/m3
Thermal conductivity (k) = 0.0248 W/(m K)
Kinematic viscosity (?) = 15.3 × 10–6 m2/s
Prandtl number (Pr) = 0.71
Specific heat (c) = 1012 J/(kg K)
Mass transfer will almost always occur for spectroscopic and eclipsing binaries
Indicate whether the statement is true or false
What is the net power that a person with surface area of 1.20 m2 radiates if his emissivity is 0.895, his skin temperature is 300 K, and he is in a room that is at a temperature of 290 K? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2•K4)
A) 60.3 W B) 62.6 W C) 65.7 W D) 68.4 W E) 64.8 W
According to Heisenberg, as the uncertainty in the measurement of a particle's momentum is reduced by a factor of 2, by what factor is the uncertainty in that same particle's position changed?
a. 1/2 b. 1 c. 2 d. 4