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{"ops":[{"insert":"A futile task is proverbially said to be \u201clike trying to empty the ocean\nwith a teaspoon.\u201d Just how futile is such a task? Estimate the number of\nteaspoonfuls of water in the Earth\u2019s oceans.\n\nI answered this exercise by using Fermi calculations.\nFirst of all, I used an estimation of all amount of water in the Earth which is\u00a0"},{"attributes":{"italic":true,"bold":true},"insert":"V\u00a0"},{"attributes":{"bold":true},"insert":"= 10"},{"attributes":{"bold":true,"script":"super"},"insert":"21"},{"attributes":{"bold":true},"insert":"L"},{"insert":". Secondly,\u00a0"},{"attributes":{"bold":true},"insert":"1 tea-spoon = 5 mL = 5x10"},{"attributes":{"bold":true,"script":"super"},"insert":"-3"},{"attributes":{"bold":true},"insert":"L"},{"insert":". Next, we will divide\u00a0"},{"attributes":{"bold":true},"insert":"10"},{"attributes":{"bold":true,"script":"super"},"insert":"21"},{"attributes":{"bold":true},"insert":"L\/5x10"},{"attributes":{"bold":true,"script":"super"},"insert":"-3"},{"attributes":{"bold":true},"insert":"L ,so the number of tea-spoons in all water in the Earth is approximately\u00a0"},{"attributes":{"italic":true,"bold":true},"insert":"N\u00a0"},{"attributes":{"bold":true},"insert":"= 2 x 10"},{"attributes":{"bold":true,"script":"super"},"insert":"23"},{"insert":". Besides, I answered the question\u00a0"},{"attributes":{"italic":true},"insert":"Just how futile is such a task?\u00a0"},{"insert":"by calculating the time is taken to empty all the water in the Earth.\nI assumed\u00a0"},{"attributes":{"bold":true},"insert":"1 tea-spoon = 5mL to empty = 1s"},{"insert":"\nthen,\n"},{"attributes":{"bold":true},"insert":"t = (2 x 10"},{"attributes":{"bold":true,"script":"super"},"insert":"23"},{"attributes":{"bold":true},"insert":")(1s) = 2 x 10"},{"attributes":{"bold":true,"script":"super"},"insert":"23"},{"attributes":{"bold":true},"insert":"s = 6 x 10"},{"attributes":{"bold":true,"script":"super"},"insert":"13"},{"attributes":{"bold":true},"insert":"\u00a0centuries"},{"insert":"\n"},{"attributes":{"bold":true},"insert":"This time is impossible to be spent by human or a machine."},{"insert":"\n\nI think that my answer is right, but I only want to check because I used the same strategy that I showed in the exercise above in all\u00a0"},{"attributes":{"bold":true},"insert":"Fermi Exercises and Calculations"},{"insert":"\u00a0in my book.\n\n"}]}

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