Word Wisdom Unit 2/Part 3 Flashcards

anatomy and physiology

What would be the advantage to a wolf in having its sympathetic nervous system stimulate the piloerector muscles? What happens in a human when the sympathetic system stimulates these muscles?

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physics

Unless the problem states otherwise, model the cornea-crystallin lens system as a single lens 2.0 cm from the retina and assume the near point is 25 cm. If the distance from the lens to the retina is 2.00 cm, show that the focal length of the lens must vary between 1.85 cm and 2.00 cm to see objects from 25.0 cm to infinity.

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chemistry

The final product of this sequence, D, is an orange, crystalline solid melting at $174^{\circ} \mathrm{C}$ and having molecular weight 186:

\begin{array}{l}\text { Cyclopentadiene }+\mathrm{Na} \longrightarrow \mathrm{C}+\mathrm{H}_{2} \\ 2 \mathrm{C}+\mathrm{FeCl}_{2} \longrightarrow \mathrm{D}+2 \mathrm{NaCl}\end{array}

In its $^{1} \mathrm{H}$ and $^{13} \mathrm{C}$ NMR spectra, product $\mathbf{D}$ shows only one kind of hydrogen and only one kind of carbon, respectively. Draw the structure of C and make a structural suggestion as to how the high degree of symmetry ofD can be explained. (D belongs to a group of compounds named after something you might get at a deli for lunch.)

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physics

A soft drink (mostly water) flows in a pipe at a beverage plant with a mass flow rate that would fill 220 0.355-L cans per minute. At point 2 in the pipe, the gauge pressure is 152 kPa and the cross-sectional area is $8.00 \mathrm{cm}^{2}$ . At point 1, 1.35 m above point 2, the cross-sectional area is $2.00 \mathrm{cm}^{2}$ . Find the volume flow rate.

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