[Solved] What is the intensity in kW/m 2 of a lase

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What is the intensity in kW/m 2 of a laser beam used to burn away cancerous tissue that, puts 216J into a circular spot 2.8mm

What is the intensity in kW/m² of a laser beam used to burn away cancerous tissue that, puts 216J into a circular spot 2.8mm in diameter in 4.5s?

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