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Calculate the energy radiated per second by a sphere (assumed to be a black-body radiator) of diameter 10 cm maintained at a constant temperature of 727^o C. Given

= 5.7 x 10 ^-8 W m ^-2 K ^-4.

Chemistry

Complete the following reaction

C₆H₅CH=CHCOOH

......................

Mathematics

The locus of the mid-point of the portion intercepted between the axes by the line x cos

+ y sin

= p passes through the point (p + 1, p - 1), then 71(4p⁴ - 20p² + 99) is equal to

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