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If a photon is deemed to fall from the sky on one square foot on earth for one hour how much temperature energy hit its surface? solve Diophantine equation : a² - ab + b² = c² .? An electric current is power,how can it be converted to energy? Five times a number subtracted from 40 is the same as three times the number find the number can you please show work thank you? Derivative for ((p ⊃ q) ⊃ (q ⊃ p))?