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tony stevens

tony s.

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BEST MATCH

DMF is used as the solvent in the second step of your synthesis. Why?

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BEST MATCH

Which is NOT an basal angiosperm? Star Anise Magnoliid Amborella Water Lily none of the above

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BEST MATCH

The information about the ethical standard that children and their parents receive regarding the nature of the research before they agree to participate is called a. informed consent. b. debriefing. c. confidentiality. d. voluntary consent.

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BEST MATCH

1. In the lab manual introduction to this experiment, you were warned that heating the sample too quickly in the region of the melting point would result in the experimentally determined melting point being higher than the true value. Explain why this is so.

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BEST MATCH

how does a decrease in money supply affect the consumer and investor?

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BEST MATCH

Both I and II are true

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BEST MATCH

Assume an individual has $60,000 in savings, and a 20% probability of losing half of it in the future. Assume also that the utility of having $60,000 is 50, the utility of having $30,000 is 40. The utility of having $50 is 48. How mich more over the fair value is the individual willing to pay to avoid the risk?

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BEST MATCH

Describe two difficulties (cons) that make it difficult to interpret the effects of brain damage in humans

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BEST MATCH

FIND: $\int \frac{x^2}{\sqrt{x^6 + 64}} dx$

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BEST MATCH

Two equal masses, m, are joined by a massless string of length L that passes through a hole in a frictionless horizontal table. The first mass slides on the table while the second hangs below the table and moves up and down in a vertical line. (string length constraint) a. Assuming the string remains taut, write the Lagrangian for the system in terms of the polar coordinates \((r, \phi)\) of the mass on the table. (6 points) b. Find the two Lagrange equations and interpret the $\phi$ equation in terms of the angular momentum $l$ of the first mass. (6 points) c. Find the value $r_0$ at which the first mass is moving in a circular path (Hint: express $\dot{\phi}$ in terms of $l$ and eliminate it from the $r$ equation.) (6 points) d. Suppose the first mass is moving in this circular path and is given a small radial nudge. Use $r(t) = r_0 + \epsilon(t)$ to rewrite the $r$ equation in terms of $\epsilon(t)$ dropping all powers of $\epsilon(t)$ higher than linear. Show that the circular path is stable and that $r(t)$ oscillates sinusoidally about $r_0$. What is the frequency of its oscillations? (7 points)

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