____________________ waves are seismic waves that do not travel through Earth's liquid core
Fill in the blank(s) with correct word
S
Stress
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Two objects move toward each other due to gravity. As the objects get closer and closer, the force between them
A) increases. B) decreases. C) remains constant.
What species absorbs photons in a protostar's outer layers?
A) H B) H2 C) H+ D) H- E) dust
What are the dimensions of area?
What will be an ideal response?
The shield of a nuclear reactor is idealized by a large 25 cm thick flat plate having a thermal conductivity of 3.5 W/(m K). Radiation from the interior of the reactor penetrates the shield and there produces heat generation that decreases exponentially from a value of 187.6 kW/ m3. at the inner surface to a value of 18.76 kW/m3 at a distance of 12.5 cm from the interior surface. If the exterior surface is kept at 38°C by forced convection, determine the temperature at the inner surface of the shield. Hint: First set up the differential equation for a system in which the heat generation rate varies according to (0)e–Cx
IVEN
Large flat plate with non-uniform internal heat generation Thickness (L) = 25 cm=0.25 m Thermal conductivity (k) = 3.5 W/(m K) Exterior surface temperature (To) = 38°C Heat generation is exponential with values of
? 187.6 kW/m3 at the inner surface
? 18.76 kW/m3 at 12.5 cm from the inner surface
FIND
The inner surface temperature (Ti)
ASSUMPTIONS
One dimensional, steady state conduction The thermal conductivity is constant No heat transfer at the inner surface of the shield
SKETCH
