Many ore deposits result from contact metamorphism during which hot, ion-rich fluids ____
A)migrate from surrounding rock into igneous intrusions
B)migrate from igneous intrusions into the surrounding rock
C)melt the surrounding rock which precipitates the ore
D)reach Earth's surface forming ore deposits as they move
E)become electrically neutral and react chemically with the surrounding rock
B
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Calculate the R-value for the following materials: (a) 4-in.-thick brick and (b) 12-in.- thick concrete slab.
What will be an ideal response?
Smelting of iron ore involves ________
A) dissolving the ore in hot water to separate iron and aluminum B) washing the ore with acid to extract iron C) crushing and heating the ore at its melting point D) heating beyond iron's melting point and combining the material with carbon E) oxidizing iron to ferric oxide and then adding silicon and boron
The critical circle in a stability analysis would be the circle with the:
a. highest resisting moments b. highest driving moments c. highest safety factor d. lowest safety factor
It is more energetically efficient for us to eat more ________
A) carnivorous animals like fish and alligator B) foods grown using IPM methods C) plant-based foods D) herbivorous animals like cattle and chicken E) GM foods