Why are volcanoes so large on Venus and on Mars?
What will be an ideal response?
Volcanoes have grown very large, which shows that after repeated eruptions the crust is not moving over hot spots.
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_________ stresses result from strains that are not due to applied external forces.
Fill in the blank(s) with the appropriate word(s).
Ordinary matter in the form stars and planet makes up approximately what proportion of the total mass and energy in the universe?
A) about 70 percent B) a few percent C) about 25 percent D) nearly a 100 percent
In a large chemical factory, hot gases at 2273 K are cooled by a liquid at 373 K with gas side and liquid side convection heat transfer coefficients of 50 and 1000 W/(m2 K), respectively. The wall that separates the gas and liquid streams is composed of 2-cm thick slab of stainless steel on the liquid side. There is a contact resistance between the oxide layer and the steel of 0.05 m2.K/W. Determine the rate of heat loss from hot gases through the composite wall to the liquid.
GIVEN
FIND
Rate of heat loss from hot gases through composite wall to liquid.
ASSUMPTIONS
- 1 Dimensional steady state heat transfer
- Thermal conductivity remain constant.
- Radiation is negligible.
SKETCH
A circuit contains two inductors of 6.0 mH inductance in parallel placed in series with an inductor of 8.0 mH inductance. After one of the 6.0 mH inductors burns out, the repairman wants to replace all three inductors with one inductor of equivalent inductance. Assuming inductors combine in series and parallel the same way resistors do, what inductance should he use?
a. 3.0 mH b. 3.4 mH c. 4.8 mH d. 11 mH e. 20 mH