abdulrehman513915

solve the given differential equation by separation of variables. y ln(x) dx /dy = (y + 1/ x)^2

solve the differential equation by variation of parameters. y'' + y = sin(x)

Two solid shafts are connected to a coupling disk B and two fixed supports at A and C. Segment AB is made of brass (G = 40 kN/m2) and BC is made of steel (G = 80 kN/m2). For the loading shown in the following figure, determine the angle of twist at point B. Also, determine the maximum shear stresses in the two segments

A packed bed reactor is used to produce styrene by the vapor phase catalytic dehydrogenation of ethylbenzene. Steam is used to prolong life of the catalyst...

The following reactions may be significant:

C6H5C2H5.  <———kst———>C6H5CH=CH2 +H2

EB<———kst——>ST+H₂

Log10(kst)=(-11370 /4.575T )+0.883

Dlta H =53600 BTU/bmol

where T is in degrees Kelvin; kst = lbmol styrene/ (h-atm-lb catalyst.

The overall equilibrium constant

T, (°C).      400                      500.                      600.         700

Kp             1.7 x 10^-3     2.5 x 10^-2        2.3 x 10^-1       1.4

Additional data

Vapor phase reaction

Feed temperature = 1124 F

Feed pressure = 20 psia

Feed molar flow rate = 1206 lbmole/h

1- From any available source, find the rate of reaction as a function of (mole fraction, concentration or partial pressure

2- Find the activation energy of the reaction

3- Design a reactor that can handle this reaction according to the given data

4- Mention the design constraints and assumptions

5- Verify the design using HYSYS and Polymath software

6- Mention the utility requirement if possible

1. 7- Mention any environmental health and safety impact of this process 8- Mention any economic, social, and cultural issues

the method of variation of parameters is used to solve for the particular solution of an homogensnous differential equation. true or false

A company manufactures two products (A and B) and the profit per unit sold is £3 and £5 respectively. Each product has to be assembled on a particular machine, each unit of product A taking 12 minutes of assembly time and each unit of product B 25 minutes of assembly time. The company estimates that the machine used for assembly has an effective working week of only 30 hours (due to maintenance/breakdown). Technological constraints mean that for every five units of product A produced at least two units of product B must be produced. Formulate the problem of how much of each product to produce as a linear program. Solve this linear program graphically. The company has been offered the chance to hire an extra machine, thereby doubling the effective assembly time available. What is the maximum amount you would be prepared to pay (per week) for the hire of this machine and why

An inextensible rope passing over a smooth pulley has two blocks of mass 20 kg 
and 30 kg attached to its two ends. The mass of the pulley is l0 kg and radius of
gyration 0.3m. Determine the tension on the rope and the acceleration of the
masseb.

I want you to select a section of the curriculum for this assignment that summarises the rule below. Basically Give me your own explanation of that principle and then explain to me why you believe that rule is necessary. Please compose your response in a full paragraph or paragraphs, and make the necessary edits and revisions. On this assignment you will be working on this guideline: now here is the rule to summarize:

After-hours Work All tasks must be turned in by the deadlines specified. The final mark for the assignment will be penalised for late submissions. Beginning the day after the assignment is due, 10% of the final assignment grade will be subtracted for each week the assignment is late. The student will no longer have access to the assignment after two weeks, at which point the grade will be recorded as a 0.