The whiteness of clouds, unlike the blueness of the sky, primarily involves
A) medium sized particles.
B) reflection and refraction of sunlight.
C) seeds upon which condensation of cloud material forms.
D) water prisms.
Answer: B
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A linear charge distribution has a charge per unit length of 
What is the magnitude of the electric field at a perpendicular distance of 0.50 m from the line charge?
A. 0.19 N/C
B. 0.38 N/C
C. 
D. 
E. 
A diatomic molecule has 2.6 × 10-5 eV of rotational energy in the l = 2 quantum state. What is its rotational energy in the l = 1 quantum state?
A) 8.7 µeV B) 3.4 µeV C) 4.1 µeV D) 7.8 µeV E) 5.3 µeV
A material's capacity to transmit fluids is called its
a. permeability. b. solifluction. c. drift. d. porosity.
Why do we think that the solar system formed from a rotating, collapsing gas cloud that ended up as a disk orbiting the Sun?
a. Most of the planets revolve and rotate in the same direction and in the same plane. b. We see clouds of gas and dust in space with apparently young stars in them. c. We see disks around young stars. d. All of the above.