In Hooke’s law, F spring = k^x, what does the F spring stand for? A. The distance the spring stretches

B. The constant of gravity

C. The elastic constant, a number that tells the relative strength of the spring

D. The amount of force acting on the spring

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.