Right Round

Posted: January 15, 2015 in Uncategorized

Basis CMYK

The earth revolves round its axis as it rotates around the sun, says the teacher. Newton and Einstein successively deduced gravity to promisingly explain the earth’s revolution around the sun. However, the explanation for our earth’s self rotation (wobbling) is, as of yet, unconvincing. It has been like this since the big bang, says science. Possible? Yes. Convincing? No, for the extreme serendipity. The earth rotating around it’s own, and at such optimal speed is something very critical for our existing. Without this rotation, there would be no life on the blue planet. In fact there would be no blue planet! Half of the earth would receive no sunshine and feature no day (literally): a perpetual cold, dark night. Forever. And the other half facing the sun would become red hot; while the dark half, in fact, would become white – ice. Perhaps blue. Or may be not. Since heat propagates in all forms and space, heat from the hot region should flow towards the cold region, and the cold region should therefore become hot in some time. How long would it take though? The hot part might tear away with radiation and the earth might lose its identity by that time. Or the earth might fall into the sun’s pit with the increasing gravity with time. Given the time constraint, will the earth be able to make it to thermal equilibrium? Let’s try to find out.

We need to calculate the total heat energy received from the sun against the amount of heat energy required to raise the temperature of the earth by one degree celsius. We also have to account the thermal conduction coefficient of the earth to calibrate the heat conduction. The specific heat capacity of the earth is 0.3 Kcal/kg.C, which is the amount of heat energy required to raise the temperature of 1 kilogram of earth by 1 degree celsius. Therefore, for the mass of the earth (5.972E24 kg), the amount of heat energy required to raise it’s temperature by 1 degree is 0.3 x 4.184 (calorie to joule) x 1000 x 5.972E24. The total energy required comes out to be 7.496E27 Joules. The total solar heat energy bestowed to the earth in a year is equivalent to 3.85E24 Joules. With this input energy, the rise in temperature of the earth’s surface in a year will be = 3.85E24/7.496E27, equaling to 0.5 milli celsius. Given this condition, it will take ~2000 years for the sun to increase the temperature of the earth by 1 degree, even though we neglected the heat loss and the not-so-efficient thermal conduction coefficient of the earth. Nevertheless, the earth should be able to come to thermal equilibrium only to become all red, before its life span.

This idea is only for the sake of thinking and is not derived or based on anyone’s previous work. The only thing that led to its invention is this song https://www.youtube.com/watch?v=CcCw1ggftuQ. I am not much into contemporary music, but this song should get you off your chair too. It’s not explicit, you can blast it off your speakers. Enjoy.

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