Which of kepler's laws describes the relationship between the average distance of a planet from the sun and the time the planet needs to make a revolution around the sun?
a. the law of gravity
b. the law of periods
c. the law of ellipses
d. the law of equal area and equal time

harry byrd declared organized resistance by southern states would prevent racial integration.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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