zubairhaj05

Equipment is placed in service on january 1. the cost of the equipment is $250,000 with a salvage value of $25,000 and an estimated useful life of five years. What amount of annual depreciation expense should be recorded on December 31 of Year 2 under the sum-of-years'-digits method?

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

1) What is the total amount of your purchase if you bought 5 sweaters for $X and 2 additional sweatersat 50% off ?

$5X

$6X

$7.5X

$10X

2. Formula for the distance (d) is given by d = rate*time. For example if you are traveling at 60 mph for 3 hours the distance traveled is 180 (=60*3). Assuming Mary is traveling at 50 mph and Jim is traveling at 60 mph, how long does Jim have to travel in order that the distance between Mary and Jim is greater than or equal to 100 miles? NOTE: After one hour Jim is 10 miles ahead

Assume Mary and Jim leave at the same time, are traveling in the same direction on parallel tracks

11 hours

9 hours

10 hours

8 hours

3.Julie buys 10 CDs for $20. If DVDs cost $2 more, how many DVDs can she buy for the same 20 dollars?Hint: How much each CD cost?

3

4

5

6

4.125% of a certain number equals 35. What is the number?

28

30

35

32

Good cost in $180 a unit but if an order is made for more than 10 units this price is teed by a discount of $2 for every additional unit up to a maximum of 60 units purchased, pries per unit is $176 if the order size is 12. ming the order size is between 10 to 60 units, write an expression for the total cost of an

The industrial production of styrene from vinylacetylene is essentially an irreversible reaction that follows an elementary rate law : 2 vinylacetylene ïƒ styrene As a newly assigned engineer, you were asked by the plant manager to provide all of these information within two working weeks : a. Calculate the conversion that can be achieved if the reaction if it is carried out in a readily available PFR reactor having a volume of 10dm3 . The entering temperature is fixed at 400 oC. Feed flow is being heated using a heat exchanger. b. Analyse the performance of the reactor by plotting graphs of temperature and conversion along the length of the reactor. c. Vary the entering temperature and plot the conversion as a function of entering temperature. d. Vary the ambient temperature of the heat exchanger and find the maximum ambient temperature for the reaction to take place in the reactor. e. Please provide (a) to (d) information with the case when the reaction is carried out adiabatically. Compare and discuss on the differences between these information. f. Repeat part (b) assuming that the reaction is reversible, having Kc = 100,000 at 400oC. In addition, a stream of inerts (CA = 100 J/mol.oC) with FI = 3FA0 enters the reactor. Plot the conversion as a function of the entering temperature. Additional information : CA0 = 1 mol/dm3 Ua = 5.0 kJ/s.dm3 /K FA0 = 5 mol/s Ta = 700 K ΔHRX = -231- 0.012(T-298) kJ/mol T0 = 673 K CPA = 0.1222 kJ/mol.K k = 1.48 x 1011 exp (-19,124/T) dm3 /mol.s

The exothermic reaction A--->B+C was carried out adiabatically and the following data recorded.

The feed molar flow rate of A was 300 moles/min.

a) What are the PFR and CSTR volumes necessary to achieve 40% conversion?

b) What is the maximum conversion that can be achieved in a 36 dm³ CSTR?

c) How many minimum number of reactors do we need in order to have a minimum total volume for a final conversion of 80%?

d) What conversion can be achieved if a 72 dm³ PFR is followed in a series by a 24 dm³ CSTR?

e) Plot the conversion and the rate of reaction as a function of PFR reactor volume up to a volume of 100 dm³?

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)]

Can you give me a herbivorous, omnivorous and carnivorous animal that a.) live in the same region and b.) have approximately the same size?

What does a carnivorous animal eat and list one of a carnivorous animal?