A certain laboratory experiment requires an aluminum wire of length of 24.0 m and a resistance of 4.70 Ω at 20.0°CWhat diameter wire must be used? (The resistivity of aluminum at 20.0°C is 2.82 10-8 Ω · m.)R 961;L/A4.70 [ (2.82 x 10^-8)(24) ]/[960;d^2/4]d^2 [4 x 2.82 x 10^-8 x 24]/[3.14 x 4.70]d^2 (0.000002707)/(14.758)d^2 (0.000002707)/(14.758)d^2 0.000000152d 0.000390434d 3.90 x 10^-4d 0.39 mmquot;INCORRECT: Your response is within 10% of the correct valueThis may be due to roundoff error, or you could have a mistake in your calculationCarry out all intermediate results to at least four-digit accuracy to minimize roundoff error.quot;
you rounded off pi in the second step.rounding errors grow bigger the more operations you go after rounding.use the full number of pi until you get to the end, then round off you should get 4.28x10^-4 or 0.428mm
why should we eat less fat? for people who are essentially sedentary, too much fat is over killIt just kind of piles up in our bodies rather than being burned as fuelSome fat is necessaryWe need it for our brains, for our nervous system, for our hormonal system, etc less sugar? for the same reason as aboveSugar is an analogy for lifeSome sugar is a lovely thing, too much sugar means you're not getting to the important stuffless water? I dont' understand the questionDrink more water, not lessEat more fiber? fiber helps keep your body moist by holding water in your bowel and tissuesfiber keeps water in your poo which helps your to excrete the nasties we come into contact with through our food and water Fake sweeteners are not the answer to too much sugarEat real food, not too much, mostly vegetables is a pretty good ruleIf you want sweeteners, use honeyDiet Coke is not a good alternativeIMO YMMV
