The 20 Common Amino Acids Flashcards

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engineering

A particular body weighs $60~ \mathrm{lb}$ on earth. Calculate its weight on the moon, where $g \simeq 5.4 \mathrm{ft} / \mathrm{sec}^2$ .

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physics

It is often easier to characterize radiation by its frequency, rather than its wavelength. The Planck formula is then written in terms of a function $I(f, T)$ defined so that $I(f, T) d f$ is the intensity in the frequency interval from $f$ to $f+d f$ . (a) Show that $I(f, T)=I(\lambda, T)|d \lambda / d f|$ . (The absolute value signs are needed to keep both distribution functions positive.) (b) Write down the Planck distribution function in terms of frequency $f$ , and sketch its behavior at a fixed temperature $T$ for $0<\lambda<\infty$ .

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chemistry

Write balanced equations and Kb expressions for these Bronsted-Lowry bases in water:

Hydroxylamine, HO-NH2,

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engineering

A rectangular gate is hinged at the water line, as shown in the given figure. The gate is $4\ \mathrm{ft}$ high and $10\ \mathrm{ft}$ wide. The specific weight of water is $62.4\ \mathrm{lbf} / \mathrm{ft}^3$ . Find the necessary force (in $\mathrm{lbf}$ ) applied at the bottom of the gate to keep it closed.