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A parallel-plate capacitor with plate separation d is connected to a battery that has a potential difference . Without breaking any of the connections, insulated handles are used to increase the plate separation to 2d.

a. Does the potential difference change as the separation increases? If so, by what factor? If not, why not?

b. Does the capacitance change? If so, by what factor? If not, why not?

c. Does the capacitor charge Q change? If so, by what factor? If not, why not?

Why is NADH an inhibitor in deamination of amino acid

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The elementary gas phase reaction

It is carried out isothermally in a flow reactor with no change in pressure. The specific reaction rate is 0.25 min^-1. A enters the reactor at a molar flow of 2 mol/min. Calculate the reactor volume to achieve 80% conversion in:

a)CSTR,

b)PFR

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Features and Application Areas of Python

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The elementary gas-phase reaction

(CH)COOC(CH3)3 → C2H6 + 2CH;COCH,

is carried out isothermally in a flow reactor. The specific reaction rate at 50°C is 10* min' and the activation energy is 85 kJ/mol. Pure di-tert-butyl peroxide enters the reactor at 10 atm and 127°C and a molar flow rate of 2.5 mol/min. Calculate the reactor volume and space time to achieve 90% conversion in:

(a). (b).

(C).

(d).

a mixed flow reactor a plug flow reactor

If this reaction is to be carried out isothermally at 127°C and an initial pressure of 10 atm in a constant-volume batch reactor with 90% conversion, how long would it take?

Assume that the reaction is reversible *with equilibrium constant,

Кс = 0.025 mol?

liter, calculate the equilibrium conversion; then redo (a) through (c)

to achieve a conversion that is 90% of the equilibrium conversion.

[Universal gas constant, R = 8.314 J/mol.K = 0.08206 (liter)(atm)/(mol)(K)]

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8. Thefollowing data pertains to the weekly demand for tomatoesinMillaunez:

Assume that tomatoes cannot bestoredfor more than one week, and that Millaunez does not tradewithother countries. Tomatoes are brought to market only once aweek,and so on Saturday, growers market 85,000 kilogramsoftomatoes.

a. Assumeperfect competition among the tomato growers; that is, thesegrowersare not organized into a monopoly. What will be thequantity oftomatoes sold? What will be the market price? (2marks)

b. Suppose the tomato growers form an association andmarket theirproduce collectively. Their association decides to actas amonopoly and maximize profits. How much produce will they selleachweek? What will the market price be? (2 marks)

Practice Problem 1. The following table reports the marginal product of the first 16 workers a tomato grower could hire, that is, it tells us how many extra tomatoes each worker could grow. The tomato grower has monthly fixed costs of $50. The monthly wage of each worker is also $50. The tomato grower participates in a perfectly competitive market where there are currently 1000 identical growers. They sell boxes of tomatoes which contain 1500 tomatoes each and currently the market price of these boxes is $200.

Worker

MP

Worker

MP

1

400

9

500

2

500

10

400

3

600

11

350

4

700

12

300

5

800

13

275

6

800

14

250

7

700

15

225

8

600

16

100

Task 1.1: Use the information provided to fill the following table.

# workers needed

TFC

TVC

TC

MC

MR

0

------------------------------------

----------------------------------------

1

2

3

4

5

48. Flour Beetles A model for describing the population of adult flour beetles involves evaluating the integral integrate (g(x))/x dx where g(x) is the per-unit-abundance growth rate for a popula- tion of size x. The researchers consider the simple case in which g(x) = a - bx for positive constants a and b. Find the integral in this case. Source: Ecology.

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