Why isn't there water on Venus?
What will be an ideal response?
High temperatures and the runaway greenhouse effect drove water vapor high up in the atmosphere, where solar ultraviolet radiation split it into hydrogen and oxygen atoms. The light hydrogen boiled off into space, and the oxygen combined with crustal rocks.
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The value of the momentum of a system is the same at a later time as at an earlier time if there are no
a. collisions between particles within the system. b. inelastic collisions between particles within the system. c. changes of momentum of individual particles within the system. d. internal forces acting between particles within the system. e. external forces acting on particles of the system.
Why does quartz sandstone have a high porosity and a high permeability?
What will be an ideal response?
Camera Exposure: A 35-mm camera equipped with a 45-mm focal length lens is used to photograph a tree 15 m tall. If the aperture of the lens is set at f/2, what is the aperture diameter?
A. 23 mm B. 14 mm C. 18 mm D. 27 mm E. 31 mm
The _____________strength of a brittle or composite material is the maximum tensile stress determined from a three-point bend test.
Fill in the blank(s) with the appropriate word(s).