Numerade

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Umar Sohail Qureshi

Numerade educator

Suppose that the government sets a price floor for milk that is above the competitive equilibrium price and that the government does not purchase any surplus milk. a. Draw a graph showing this situation. Be sure your graph shows the competitive equilibrium price, the price floor, the quantity that would be sold in competitive equilibrium, and the quantity that would be sold with the price floor. b. Compare the economic surplus in this market when there is a price floor and when there is not.

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Pritesh Ranjan

Numerade educator

A proton enters the uniform electric field produced by the two charged plates shown below. The magnitude of the electric field is $4.0 \times 10^{5} \mathrm{N} / \mathrm{C},$ and the speed of the proton when it enters is $1.5 \times 10^{7} \mathrm{m} / \mathrm{s}$. What distance $d$ has the proton been deflected downward when it leaves the plates?

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A cylindrical water basin will be built to harvest rainwater. The basin is limited in that the largest radius it can have is 10 feet. Write a function representing the volume of water $V$ as a function of height $h .$ How many additional gallons of water will be collected if you increase the height by 2 feet? Hint: 1 cu $\mathrm{ft}=7.48$ gal.

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(II) A storage tank contains 21.6 $\mathrm{kg}$ of nitrogen $\left(\mathrm{N}_{2}\right)$ at an absolute pressure of 3.85 atm. What will the pressure be if the nitrogen is replaced by an equal mass of $\mathrm{CO}_{2}$ at the same temperature?

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Eduard Sanchez

Numerade educator

(II) Determine the time it takes for a satellite to orbit the Earth in a circular $\textbf{near-Earth orbit}$. A "near-Earth" orbit is at a height above the surface of the Earth that is very small compared to the radius of the Earth. [$Hint$: You may take the acceleration due to gravity as essentially the same as that on the surface.] Does your result depend on the mass of the satellite?

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David Collins

Numerade educator

Draw the Lewis structure for HCSNH2. (The carbon and nitrogen atoms are bonded together, and the sulfur atom is bonded to the carbon atom.) Label each bond in the molecule as polar or nonpolar.

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Ma Ednelyn Lim

Numerade educator

A gas increases in pressure from 2.00 atm to 6.00 atm at a constant volume of 1.00 $\mathrm{m}^{3}$ and then expands at constant pressure to a volume of 3.00 $\mathrm{m}^{3}$ before returning to its initial state as shown in Figure $\mathrm{P} 12.31$ How much work is done in one cycle?

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Prabhat Tyagi

Numerade educator

Fermat's principle states that a light ray's path is such that the time to traverse that path is an extremum (a minimum or a maximum) when compared with times for nearby paths. Show that Fermat's principle implies Snell's law by proving that a light ray going from point $A$ in one medium to point $B$ in a second medium will take the least time if it obeys Snell's law.

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Leon Druch

Numerade educator

In Exercises $1-8,$ use graphs and tables to find (a) $\lim _{x \rightarrow \infty} f(x)$ and (b) $\lim _{x \rightarrow-\infty} f(x)$ (c) Identify all horizontal asymptotes. $$f(x)=\frac{e^{-x}}{x}$$

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Bryan Valdivia

Numerade educator

Which type of epithelial tissue specializes in moving particles across its surface and is found in airways and lining of the oviduct? a. transitional b. stratified columnar c. pseudostratified ciliated columnar d. stratified squamous

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Brian P.