Explain digestion from the mouth to the anus. What are the enzymes that carrying it ? What does the ph need to be for them to work ? The acids ?

Im trying to derive Cp - Cv = R where Cp and Cv are the molar specific heats at constant pressure and volume respectively. (R = 8.314 J/(mol*K)). So I'm only having problems with the last step.

I get that for a process at constant pressure we have:

∆E(internal) = Q + W = nCp∆T - P∆V

And I get that for a process at constant volume we have:

∆E(internal) = Q + W = Q + 0 => ∆E(internal) = Q

The last step is setting these two equations equal to one another, but I don't understand how we know that the internal energy of both processes are the same.

Ernest Rutherford (the first New Zealander to be awarded the Nobel Prize in Chemistry) demonstrated that nuclei were very small and dense by scattering helium-4 nuclei (4He) from gold-197 nuclei (197Au). The energy of the incoming helium nucleus was 7.47 ✕ 10−13 J, and the masses of the helium and gold nuclei were 6.68 ✕ 10−27 kg and 3.29 ✕ 10−25 kg, respectively (note that their mass ratio is 4 to 197). (Assume that the helium nucleus travels in the +x direction before the collision.) a)If a helium nucleus scatters to an angle of 108° during an elastic collision with a gold nucleus, calculate the helium nucleus' final speed (in m/s) and the final velocity (magnitude in m/s and direction counterclockwise from the +x-axis) of the gold nucleus. b)What is the final kinetic energy (in J) of the helium nucleus?

What is an example in society about Hypothesis testing?

Use tabulated half-cell potentials to calculate ?G?rxn for each of the following reactions at 25 ?C.

Part A 2Fe3+(aq)+3Sn(s)?2Fe(s)+3Sn2+(aq)

Part B O2(g)+2H2O(l)+2Cu(s)?4OH?(aq)+2Cu2+(aq)

Part C Br2(l)+2I?(aq)?2Br?(aq)+I2(s)

A Light of wavelength 650 nm falls on two slits and produces an interference pattern in which the third-order bright red fringe is 47 mm from the central fringe on a screen 1.4 m away.

What is the separation of the two slits?

B In a double-slit experiment, the third-order maximum for light of wavelength 520 nm is located 17 mm from the central bright spot on a screen 1.6 m from the slits. Light of wavelength 630 nm is then projected through the same slits. How far from the central bright spot will the second-order maximum of this light be located?

C Light of wavelength 620 nm falls on a slit that is 3.70×10⁻³ mm wide. How far the first bright diffraction fringe is from the strong central maximum if the screen is 10.5 m away.

D A grating that has 3900 slits per cm produces a third-order fringe at a 27.0 ∘ angle.

What wavelength of light is being used?

E Red laser light from a He-Ne laser (λ = 632.8 nm) creates a second-order fringe at 53.2∘ after passing through the grating. What is the wavelength λ of light that creates a first-order fringe at 22.0 ∘ ?

F Light of wavelength 670 nm passes through two narrow slits 0.65 mm apart. The screen is 2.40 m away. A second source of unknown wavelength produces its second-order fringe 1.21 mm closer to the central maximum than the 670 nm light. What is the wavelength of the unknown light?

Will Magnesium spontaneously reduce Copper ion (Cu+2) to Copper (Cu)? Explain. What is the Edegree?

Mg(s) + Cu+2(aq)---> Cu(s) + Mg+2(aq)

How a cell can extract 38 molecules of ATP (net) from one molecule of glucose? Explain in detail.

Business Ethics: Do you think these codes are effective?

Explain why vacuum pumps are used with rotary evaporators. What is the advantage of using a vacuum pump with a rotary evaporator?

What are three incidences in which animations or transitions may be appropriate in a business presentation and then three cases in which you think they'd be too much?

Initial public offering  

On April​ 13, 2017​, Yext Inc. completed its IPO on the NYSE. Yext sold 10,500,000 shares of stock at an offer price of ​$13 with an underwriting discount of ​$0.76 per share.​ Yext's closing stock price on the first day of trading on the secondary market was ​$13.43​, and 85,489,470 shares were outstanding.

a. Calculate the total proceeds for​ Yext's IPO.

b. Calculate the percentage underwriter discount.

c. Calculate the dollar amount of the underwriting fee for​ Yext's IPO.

d. Calculate the net proceeds for​ Yext's IPO.

e. Calculate​ Yext's IPO underpricing.

f. Calculate​ Yext's market capitalization.

The Distance Plus partnership has the following capital balances at the beginning of the current year:

Each of the following questions should be viewed independently.

1. If Sergio invests $60,000 in cash in the business for a 20 percent interest, what journal entry is recorded? Assume that the bonus method is used.

2. If Sergio invests $40,000 in cash in the business for a 20 percent interest, what journal entry is recorded? Assume that the bonus method is used.

3. If Sergio invests $50,000 in cash in the business for a 20 percent interest, what journal entry is recorded? Assume that the goodwill method is used.

Note: there is one JE for A to record the admission of new partner under bonus method, one JE for B, to record the admission of new partner under bonus method, and 2 JE's for C, the first to record the entry for goodwill allocation, during the admission of a new partner and the second to record the investment made by the new partner in the business.

1 A buffer is prepared by mixing 50.0 mL of 0.100 M acetic acid with 30.0 mL of 0.100 M sodium hydroxide and 20.0 mL of distilled water. Estimate the concentration of acetic acid in the resulting buffer. Report your answer in moles/liter, but do not include units with your answer. 2 Determine the concentration of acetate ions in the buffer solution. Report your answer in moles per liter, but do not include units in your answer. 3 Estimate the pH of the buffer solution using the Henderson-Hasselbalch equation. 4 Using the Henderson-Hasselbalch equation, estimate the pH of the buffer if an additional 10.0 mL of 0.100 M sodium hydroxide is added. 5 Estimate the pH of the original buffer if 10.0 mL of 0.100 M hydrochloric acid is added.