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It is estimated that per minute each cm^...

It is estimated that per minute each `cm^(2)` of earth receives about 2 calorie of heat energy from the sun. This constant is called solar constant S. Express solar constant in SI units.

Text Solution

Verified by Experts

Given that
`S = 2" cal/cm"^(2)` min
But as 1 cal `=4.18 J, 1 cm=10^(-2) m` and 1 min = 60 s
`S=(2xx4.18 J)/((10^(-2)m)^(2)(60s))`
`~~1.4xx10^(3) J/(m^(2)s)` or `S=1.4xxkW//m^(2)`
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