Air becomes saturated when its temperature
A) falls to a point where water vapor molecules evaporate.
B) rises to a point where water vapor molecules condense.
C) rises to a point where water vapor molecules evaporate.
D) falls to a point where water vapor molecules condense.
Answer: D
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Newton's second law states: sum of forces = mass × acceleration. If a known force was applied to an object with a known mass, how would you predict that object's acceleration?
A) acceleration = mass × sum of forces B) acceleration = sum of forces / mass C) acceleration = mass / sum of forces D) Newton's second law is irrelevant for solving this problem.
Compare the planar atom density of the {100}-type planes with the {111}-type planes in the FCC structure of copper that has a lattice parameter of 0.361 nm.
What will be an ideal response?
According to our theory of solar system formation, what three major changes occurred in the solar nebula as it shrank in size?
A) It got hotter, its rate of rotation increased, and it flattened into a disk. B) Its mass, temperature, and density all increased. C) It gained energy, it gained angular momentum, and it flattened into a disk. D) Its gas clumped up to form the terrestrial planets, nuclear fusion produced heavy elements to make the jovian planets, and central temperatures rose to more than a trillion Kelvin.
If F = 40 N and M = 1.5 kg, what is the tension in the string connecting M and 2M? Assume that all surfaces are frictionless
a.
13 N
b.
23 N
c.
36 N
d.
15 N
e.
28 N