Significant Figures: The number of significant figures in 0.01500 is
A. two.
B. three.
C. four.
D. five.
Answer: C
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If a fictional shrinking man shrinks proportionately to 1/10 his original height, his weight will be multiplied by
A) 0.1. B) 0.01. C) 0.001. D) 0.0001. E) none of the above
What do CAIs include?
a. carbon and aluminum b. carbon and ammonium c. calcium and argon d. chlorine and argon e. calcium and aluminum
The number of moles of solute per liter of solution is called the ______________ of the solution
Fill in the blank(s) with correct word
Consider a design for a nuclear reactor using natural-convection heating of liquid bismuth as shown. The reactor is to be constructed of parallel vertical plates 1.8 m tall and 1.2 m wide, in which heat is generated uniformly. Estimate the maximum possible heat dissipation rate from each plate if the average surface temperature of the plate is not to exceed 870°C and the lowest allowable bismuth temperature is 315°C.
GIVEN
• Vertical plates with uniform heat generation in bismuth
• Plate height (L) = 1.8 m
• Plate width (w) = 1.2 m
• Maximum average surface temperature (Ts) = 870°C
• Minimum bismuth temperature (T?) = 315°C
FIND
• Maximum possible heat dissipation rate (q) from each plate
ASSUMPTIONS
• Steady state
• Free convection only
• Edge effects are negligible
SKETCH
PROPERTIES AND CONSTANTS
for bismuth at the mean temperature of (592.5°C)
Thermal conductivity (k) = 15.58 W/(m K)
Kinematic viscosity (?) = 0.991 × 10–7 m2/s
Prandtl number (Pr) = 0.010 Also Density at 538°C (?538) = 9739 kg/m3 Density at 649°C (?649) = 9611 kg/m3
To find the thermal expansion coefficient (?)
