If the point of the nail can be approximated as a circle with radius 2.00 x 10-3 m, what is the pressure in megapascals
(MPa) exerted on the wall if a hammer strikes the nail with a
force of 104 N? Use 3.14 for II.

b) mutualism

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plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.