Compute the ratio of energy per unit area 7- radiated from a sunspot at temperature t = 4 500 k to that of the typical solar surface with temperature t = 5800 k.

and 1and 1

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle

answer(20) psi;