What will be effect on beat of Earth if temperature of sun 4 times increased.?

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answers:
Zirp say: Earth would become warmer, but probably not by a factor of 256.

I'm assuming that by "four times" you mean expressed in Kelvins
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Ronald 7 say: We wouldn't need Sunbeds
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Climate Realist say: The amount of heat that Earth would receive would increase by a factor of 256.

We would not last long.
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Acetek say: the earth will be cooked
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CarolOklaNola say: All the ice would melt and the oceans would evaporate. Water vapor is more effective green house gas than carbon dioxide.
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say: There would be a run on ice.
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PETER M say: The water everywhere will evaporate and all land life, including plants won't have water to drink and in four days every human on Earth will die of dehydration. All life needs water in order to live.
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az_lender say: The incoming solar radiation would increase by a factor of 64, and the temperature of the earth would increase by ROUGHLY a factor of 4; but a detailed atmospheric model would be necessary to improve on this answer. We might end up like Venus, with a steamy greenhouse, or we might end up like Mercury with no atmosphere at all.
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billrussell42 say: "on beat" ? what does this mean.

All life on earth would be gone, probably, although you cannot multiply temperatures by a constant unless you picked the scale, as it would vary.
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WHANKING-WILLY say: A steep rise in suntan creams.
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