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1.) A dental X-ray typically affects 186 g of tissue and delivers about 3.7 μJ of...

1.) A dental X-ray typically affects 186 g of tissue and delivers about 3.7 μJ of energy using X-rays that have wavelengths of 0.034 nm.

What is the energy ?photon, in electron volts, of X-ray photons?

How many photons are absorbed during the dental X-ray? Assume the body absorbs all of the incident X-rays.

2.) A traveling electromagnetic wave in a vacuum has an electric field amplitude of 63.5 V/m. Calculate the intensity ? of this wave. Then, determine the amount of energy ? that flows through area of 0.0229 m2 over an interval of 14.9 s , assuming that the area is perpendicular to the direction of wave propagation.

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