Which major atmospheric component is chiefly a product of life processes?
A) Carbon dioxide
B) Water
C) Oxygen
D) Hydrogen sulfide
E) Nitrogen
C
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The Doppler effect is sensitive only to motion along the line of sight
a. True b. False Indicate whether the statement is true or false
Imagine for a minute that the Moon is held in its orbit about the Earth by electrical forces rather than by gravitation. What electrical charges ?Q on the Earth and +Q on the Moon are necessary to hold the Moon in a circular orbit with a period of 27.3 days? The Earth-Moon distance is 384,000 km and the mass of the Moon is 7.35 × 1022 kg.
What will be an ideal response?
In a gaseous mixture of hydrogen and oxygen, the molecules having the greater average kinetic energy are
A) hydrogen. B) oxygen. C) both the same D) not enough information
The lesser amount of a substance in a solution is generally called the
a. solute. b. salt. c. solvent. d. alloy.