As air temperature cools below its dew point temperature, the air's water vapor
A) increases.
B) decreases.
C) condenses.
D) evaporates.
Answer: C
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The major difference in the composition of Earth's atmosphere compared to the atmospheres of Venus and Mars is a direct consequence of
a. life on Earth. b. Earth's plate tectonics. c. differences in the greenhouse effect. d. the presence of liquid water. e. differing distances from the Sun.
An electron has the same de Broglie wavelength as a 1.8 eV photon. The speed of the electron is closest to:
A) 1,100 m/s B) 980 m/s C) 910 m/s D) 840 m/s E) 770 m/s
What must the initial state of motion of a charged particle be if it will follow a helical path in a magnetic field?
a) It must be moving at an angle that is neither parallel to nor perpendicular to the magnetic field. b) It must be moving parallel to the magnetic field. c) It must be moving perpendicular to the magnetic field. d) It must be moving in the direction opposite to the magnetic field. e) It must be initially at rest when it is placed in the magnetic field.
A boulder rolls off of a very high cliff. If you disregard air, while it is falling, its trajectory is never truly vertical
A) True B) False