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James Calhoun

James C.

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Darshan Maheshwari verified

Numerade educator

Express each interval in set-builder notation and graph the interval on a number line. $$(-\infty, 2)$$

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If an object on a horizontal, frictionless surface is attached to a spring, displaced, and then released, it will oscillate. If it is displaced 0.120 m from its equilibrium position and released with zero initial speed, then after 0.800 s its displacement is found to be 0.120 m on the opposite side, and it has passed the equilibrium position once during this interval. Find (a) the amplitude; (b) the period; (c) the frequency.

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Darshan Maheshwari verified

Numerade educator

Differentiate. $ f(\theta) = \theta $ cos $ \theta $ sin $ \theta $

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C D verified

Numerade educator

7. Which is the most diverse group of seedless vascular plants? a. the liverwortss b. the horsetails c. the club mosses d. the ferns

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A taut clothesline has length $L$ and a mass $M .$ A transverse pulse is produced by plucking one end of the clothesline. If the pulse makes $n$ round trips along the clothesline in $t$ seconds, find expressions for (a) the speed of the pulse in terms of $n, L,$ and $t$ and (b) the tension $F$ in the clothesline in terms of the same variables and mass $M .$

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(II) What is the momentum of a 950 -MeV proton (that is, its kinetic energy is 950 $\mathrm{MeV}$ )?

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Ashwin Banarsee verified

Numerade educator

Why Don't We Diffract? (a) Calculate the de Broglie wavelength of a typical person walking through a doorway. Make reasonable approximations for the necessary quantitics. (b) Will the person in part (a) exhibit wave-like behavior when walking through the "single slit" of a doorway? Why?

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Bryan Valdivia verified

Numerade educator

Which of the following reactions releases energy? a. $\mathrm{AMP}+$ phosphate $\rightarrow \mathrm{ADP}+\mathrm{H}_{2} \mathrm{O}$ b. $\mathrm{ADP}+$ phosphate $\rightarrow \mathrm{ATP}+\mathrm{H}_{2} \mathrm{O}$ c. $\mathrm{ATP}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{ADP}+$ Phosphate d. $\mathrm{AMP}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{ATP}+$ Phosphate

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Bryan Valdivia verified

Numerade educator

Which of the following polysaccharides is used as an energystorage molecule in plants? a. glycogen b. chitin c. starch d. cellulose

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Hubert Agamasu verified

Numerade educator

The helicopter view in Figure $P 1.70$ shows two people pulling on a stubborn mule. Find (a) the single force that is equivalent to the two forces shown and (b) the force a third person would have to exert on the mule to make the net force equal to zero. The forces are measured in units of newtons (N).

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