In order for clouds to form, air must be lifted. The three principal lifting mechanisms are
A) orographic, condensational, and frontal lifting.
B) orthographic, conversational, and frontal lobotomy.
C) convectional, orographic, and frontal lifting.
D) adiabatic, topographic, and inversional lifting.
Answer: C
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A sailboat of mass m is moving with a momentum p. Which of the following represents its kinetic energy?
A) p2/2m B) mp C) mp/2 D) 1/2 mp2 E) mp/3
Charge of uniform density (20 nC/m2) is distributed over a cylindrical surface (radius = 1.0 cm), and a second coaxial surface (radius = 3.0 cm) carries a uniform charge density of ?12 nC/m2 . Determine the magnitude of the electric field at a point 2.0 cm from the symmetry axis of the two surfaces
a. 2.3 kN/C b. 1.1 kN/C c. 1.7 kN/C d. 3.4 kN/C e. 4.5 kN/C
Which one of the following is TRUE?
A) Most elliptical galaxies contain only young stars. B) Most galaxies appear to be approaching the Milky Way Galaxy. C) Irregular galaxies rarely have star formation taking place in them. D) Smaller galaxies called dwarf galaxies tend to be found around larger galaxies like the Milky Way. E) Galaxy collisions destroy most of the stars in the galaxies involved.
The rise in ocean levels is due to
A) warmer water. B) melting of ice on land that flows into the ocean. C) both of these D) none of the above