# Newtonian Physics by Benjamin Crowell

By Benjamin Crowell

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Extra resources for Newtonian Physics

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Does your answer make sense when you take the square root? (d) Suppose someone proposes to you a third kind of mean, called the superduper mean, defined as (ab)1/3 . Is this reasonable? Solution, p. 269 9 In an article on the SARS epidemic, the May 7, 2003 New York Times discusses conflicting estimates of the disease’s incubation period (the average time that elapses from infection to the first symptoms). 4 days. But other statistical calculations ... ” What’s wrong here? 10 The photo shows the corner of a bag of pretzels.

Correct solution #1: Volume scales like the third power of the linear size, so the larger sphere has a volume that is 125 times greater (53 = 125). Correct solution #2: The volume of a sphere is V = (4/3)πr 3 , so m / Example 2. The big sphere has 125 times more volume than the little one. ) n / Example 3. ” Scaling of a more complex shape example 3 The first letter “S” in figure n is in a 36-point font, the second in 48-point. How many times more ink is required to make the larger “S”? 78. 33 times more ink is required.

The use of metric units based on the meter, kilogram, and second. Example: meters per second is the mks unit of speed, not cm/s or km/hr. mass . . . . A numerical measure of how difficult it is to change an object’s motion. significant figures Digits that contribute to the accuracy of a measurement. Notation m . . kg . . s . . . M- . . k- . . m- . . µ- . . n- . . . . . . . . . . . . . . . . . . . . . . meter, the metric distance unit kilogram, the metric unit of mass second, the metric unit of time the metric prefix mega-, 106 the metric prefix kilo-, 103 the metric prefix milli-, 10−3 the metric prefix micro-, 10−6 the metric prefix nano-, 10−9 Summary Physics is the use of the scientific method to study the behavior of light and matter.