The Book of Times: From Seconds to Centuries, a Compendium by Lesley Alderman

By Lesley Alderman

An ceaselessly interesting, fantastically designed survey of time—how lengthy issues take, how lengthy issues final, and the way we spend our days

Our dating to time is complicated and paradoxical: Time stands nonetheless. Time additionally flies. the next day to come is one other day. but there's no time just like the current. we wish to do extra in much less time, yet want lets gradual the clock. And regardless of all our time-saving devices—iPhones, DVRs, high-speed trains—Americans think that they've much less rest time than ever.

In an period whilst our time feels fractured and imperiled, The ebook of Times encourages readers to contemplate time used and time spent. How lengthy does it take to discover a brand new mate, digest a hamburger, or compose a symphony? How a lot time can we spend having a pipe dream, texting, and preparing for paintings? The ebook demanding situations our ideals and urges us to contemplate how, and why, a few issues get quicker, a few issues decelerate, and a few issues by no means swap (the want for seven to 8 hours of sleep).

Packed with compelling charts, lists, and quizzes, in addition to new and interesting study, The booklet of Times is an addictive, browsable, and provocative examine the belief of time from each direction.

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The Book of Times: From Seconds to Centuries, a Compendium of Measures

An ceaselessly attention-grabbing, fantastically designed survey of time—how lengthy issues take, how lengthy issues final, and the way we spend our days

Our courting to time is advanced and paradoxical: Time stands nonetheless. Time additionally flies. day after today is one other day. but there's no time just like the current. we wish to do extra in much less time, yet want shall we sluggish the clock. And regardless of all our time-saving devices—iPhones, DVRs, high-speed trains—Americans consider that they've much less rest time than ever.

In an period whilst our time feels fractured and imperiled, The booklet of instances encourages readers to think about time used and time spent. How lengthy does it take to discover a brand new mate, digest a hamburger, or compose a symphony? How a lot time will we spend having a pipe dream, texting, and preparing for paintings? The ebook demanding situations our ideals and urges us to contemplate how, and why, a few issues get speedier, a few issues decelerate, and a few issues by no means swap (the desire for seven to 8 hours of sleep).

Packed with compelling charts, lists, and quizzes, in addition to new and interesting learn, The e-book of instances is an addictive, browsable, and provocative examine the assumption of time from each direction.

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11) identically for all possible integration limits. We now claim that this identity is possible only if the integrands themselves are balanced, namely if ∂H ∂G =P− . 11) under a single integral and then arriving at a combined integrand whose integral must vanish no matter what limits of integration are used. Clearly, if the integrand is continuous and does not vanish at some point in the domain of integration it will also not vanish at any point in a small interval containing that point (by continuity).

Except for the case in which the body is the whole real line, this situation is likely to arise at some points and at some instants. Collecting the results of the measuring devices, at each instant of time t we certainly obtain a field, namely a function of x defined over the current configuration, that is, the open interval χ(κ0 (B), t) of RS . This open interval, however, is a function of time. 29). Our immediate interest is in establishing a precise connection between the Lagrangian and Eulerian versions of the field associated with the same physical variable.

The drug concentration at the ends of the spine segment is artificially maintained at the value c for all subsequent times. If, in the absence of any production, T is the time elapsed until the difference between the concentration at the midpoint of the spine and c reaches one-half of its initial value, calculate the longitudinal diffusion coefficient D of the drug through the spinal meninges. For a rough order of magnitude, assume L = 10 mm and T = 3 hours. 3, where v is the velocity of the pollutant relative to the underlying substrate.

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