The melting point of silicate minerals is strongly dependent on the amount of silica it contains. The first minerals to melt are those with
What will be an ideal response?
A) lowest melting point and lowest silica content.
B) lowest melting point and highest silica content.
C) lowest silica content and highest melting point.
D) highest silica content and highest melting point.
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The speed v of sound waves in a gas can be expressed in terms of the pressure p and the density ? (mass per unit volume) of the gas, as v = apb?c, where a, b, and c, are dimensionless constants. The dimensions of pressure are [M]/[L][T]2
What must be the values of b and c?
The nucleus that has the greatest mass per nucleon is
A) hydrogen. B) iron. C) lead. D) uranium. E) plutonium.
Type II supernovae occur when their cores start making
A) silicon. B) iron. C) uranium. D) carbon. E) oxygen.
A friend argues that if mass were really conserved he would never need to refill his gas tank. What explanation do you offer your friend?
A) The atoms (mass) of gasoline are converted into energy by the engine according to E=mImage. B) The Law of Conservation of Mass does not apply to reactions involving combustion or explosion of matter. C) The atoms (mass) of gasoline are converted into exhaust fumes. D) The oil companies make gasoline in a way that it gets used up so that we are always required to replenish it.