The dark gray areas of the Moon visible from Earth are called _____
A) maria
B) albedo
C) anorthosite
D) breccias
A
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Clocks on fast-moving spaceship shizzing past Earth appear to run slow when viewed from
A) inside the spaceship. B) Earth. C) Both of these. D) Neither of these.
The downdraft in a thunderstorm is strengthened as
A) warm moist air sinks in the thunder cell. B) dry air is drawn into the cloud, raindrops evaporate, and the air chills. C) cold moist air condenses. D) precipitation particles grow and fall.
A 20-m long steel wire (cross-section 1.0 cm2, Young's modulus 2.0 × 1011 N/m2), is subjected to a load of 25 000 N. How much will the wire stretch under the load?
A. 0.25 cm B. 2.5 cm C. 12.5 cm D. 25 cm E. 1.25 cm
What kind of pressure prevents a white dwarf from collapsing?
A) neutron degeneracy pressure B) electron degeneracy pressure C) thermal pressure D) radiation pressure