1.

According to Newton’s law of cooling ms (d theta)/(dt)=-K(theta-theta_0). If sigma is Stefan’s constant, A is surface area of the body and T_@ is temperature of surroundings in K, then the value of K on the basis of Stefan-Boltzmann law is –

Answer»

`SIGMA AT_(0)^4`
`sigma AT_0^3`
`4sigma AT_0^4`
`4sigma A T_0^3`

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