2c:[] 2a:{"title":"The diminishing returns of going faster","cells":[{"id":0,"value":"# The diminishing returns of going faster","pinned":false,"hidden":false,"mode":"md"},{"id":17,"value":"\n ${times.map(({mph1, mph2, miles}) => htl.html`\n \n \n \n \n \n \n `)}\n

Going

${mph2} mph

instead of

${mph1} mph

saves you 1 minute every

${f2(miles, \"mile\")}

","pinned":false,"hidden":false,"mode":"html"},{"id":59,"value":"_E.g._, suppose you drive for 1 mile. At 20 mph, it takes 3 minutes; at 30 mph, it takes 2. You’ve saved one minute per mile.\n\nHowever, as Mike points out, kinetic energy is ${tex`{\\frac {1}{2}}mv^{2}`}. So, the faster you go, the more that one more mile per hour adds to your kinetic energy.\n\nI’d say my main lesson from my cross-country drive in 2020 was that speeding saves very little time compared to the time wasted checking your phone at a gas station.\n\n---","pinned":false,"hidden":false,"mode":"md"},{"id":3,"value":"function distanceToSaveTime(mph1, mph2, minutesSaved) {\n const hoursSaved = minutesSaved / 60;\n const distance = hoursSaved / (1 / mph1 - 1 / mph2);\n return distance;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":10,"value":"times = d3.range(10, 100, 10).map(mph1 => {\n const mph2 = mph1 + 10;\n const miles = distanceToSaveTime(mph1, mph2, 1);\n return {mph1, mph2, miles}\n})","pinned":true,"hidden":false,"mode":"ojs"},{"id":12,"value":"f = d3.format(\".1f\")","pinned":true,"hidden":false,"mode":"ojs"},{"id":52,"value":"f2 = (n, unit) => {\n const ignorable = [\"0\", \".\"];\n const str = f(n);\n const chars = [...str];\n let ignore = true;\n const spans = [];\n for (let i = chars.length - 1; i >= 0; i--) {\n const char = chars[i];\n const ignoreThis = ignorable.includes(char);\n if (ignore && ignoreThis) {\n // Or should they be gray?\n spans.unshift(htl.html`${char}`);\n } else {\n if (ignore && !ignoreThis) ignore = false;\n spans.unshift(htl.html`${char}`);\n }\n }\n // return spans;\n return htl.html`${spans} ${unit}${Number(str) === 1 ? htl.html`s` : `s`}`;\n}","pinned":true,"hidden":false,"mode":"ojs"},{"id":31,"value":"","pinned":true,"hidden":false,"mode":"html"}],"files":"$W2c","stdlib":"1","titling":"auto"}