The critical angle is least in
A) glass.
B) water.
C) diamond.
D) vacuum.
Answer: C
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While a car travels around a circular track at a constant speed, its
A) acceleration is zero. B) velocity is zero. C) inertia is zero. D) none of the above
The "top-down" approach to creating artificial life starts
A) in the laboratory with the raw ingredients of life, and seeks to reproduce life in much the same way that it presumably originated billions of years ago B) with a complex organism and then removes cells that are not absolutely necessary C) with existing organisms and genetically strips them down, then tries to rebuild them into new species D) with animal cells and attempts to clone them
Equal volumes of hydrogen and helium gas are at the same pressure. The atomic mass of helium is four times that of hydrogen. If the total mass of both gases is the same, the ratio of the temperature of helium (He) to that of hydrogen (H2) is
A.
.B.
.C.
D.
E.
Which has the greatest effect on the flow of fluid through a pipe? That is, if you made a 10% change in each of the quantities below, which would cause the greatest change in the flow rate?
A) the fluid viscosity B) the length of the pipe C) the pressure difference D) the radius of the pipe E) the fluid density