Question 102 - (a) As an approximation, let v = Zc / 137 where v is the radial velocity for 1 s electron of an element, c is the speed of light, Z is the atomic number. For gold with Z = 79, find the radial velocity of its 1 s electron, in term of c and percentage of the speed of light. (b) As an approximation, let A x A = 1 - Z x Z / 18769 where A is the ratio of the relativistic and non-relativistic Bohr radius. Find the value of A.

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What are demand of crotonaldehyde99% in the worldand its international market ?

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Experiment constitutes 1000 ml of 10 ppm dye solution and 0.2 g catalyst mixed in beaker. How to calculate the initial of concentration?

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If the refrigerator is left open in closed room, What will be the effect on room temp.?

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Are there any methods of preventing cracking of carbon steel welds in refining environments?

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How can I remove/decrease TDS from sewage waste water? At the moment it is 900gm/l. What is recommended TDS level to dispose sewage water in sea?

2 Answers   OGDCL,

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what is chemical engineering?

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BIOPROCESS ENGINEERING - EXAMPLE 14.1 : In differential centrifugation of cells with diameter D in centimeter, the square of D is given by D x D = [18n ln (RF / RI) ] / [ (RP - RFF) Wt ] where n is the fluid viscosity (poise), RF is the final radius of rotation (cm), RI is the initial radius of rotation (cm), RP is cell density (g / ml), RFF is the fluid density (g/ml), W the square for the rotational velocity in (radians / s) (radians / s), t is the time required to sediment from RI to RF (s). Derive an equation for W as a function for D, n, RF, RI, RP, RFF and t, with the stated units above, in radian & degree.

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Input the Roll Number, Name and marks of a small section of 5 students. Display the marks database of these students in the following format. The "Roll Number" and "Name" fields are left justified with 15 columns, and 25 columns, respectively. The "Marks" field is right justified with 5 columns. Assume the marks are in multiples of 0.5 and are from 0 to 100. Display some spaces between each field appropriately. Roll Number 11001 11050 11081 11225 Y2367 Name FIRST NAME LAST NAME FIRSTNAME2 LASTNAME2 I1. I2. FIRSTNAME3 FIRSTNAME4 M1. LASTNAME4 FIRSTNAME5 MID LASTNAME5 Marks 95 80 88 77.5 89.5 The input can be stored in a file, say, marksdata.txt, and the program can be executed by using ./a.out < marksdata.txt

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What is a Spool in terms of piping Industry?

2 Answers   Punj Lloyd Ltd,

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What does Dew point -40C mean in an air drying unit.

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Explain how can viscosity affect the design of a mixer?

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