Volcanic rocks form from
A) the eruption of viscous magma.
B) partial melting of basalt.
C) solidification of lava.
Answer: C
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The ionization energy of the hydrogen atom is 13.6 eV. What is the energy of the n = 5 state?
a. –0.544 eV c. 0.544 eV b. 0.378 eV d. –0.378 eV
The San Andreas fault in California is thought to be a boundary of two plates
a. that are separating from one another. b. where one is pushing over the top of the other. c. that are sliding horizontally past one another. d. that are basically at rest.
Suzie Skydiver, who weighs 500 N, reaches terminal velocity of 90 km/h. The air resistance on Suzie is then
A) 90 N. B) 250 N. C) 410 N. D) 500 N. E) none of the above
The time between equinoxes on Uranus is about:
A) 7 hours. B) 8 hours. C) 21 years. D) 42 years. E) 84 years.