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 is petrol density ? why ?

3 Answers   Reliance,

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Chemical Engineering Unit Operation - Which of the sequence below represent a feasible flows of ethanol processing plants using cellulose as starting material? A. raw material --> heat exchanger --> distillation column --> reactor. B. reactor --> distillation column --> raw material --> heat exchanger. C. heat exchanger --> raw material --> distillation column --> reactor. D. raw material --> heat exchanger --> reactor --> distillation column. E. distillation column --> raw material --> reactor --> heat exchanger.

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Suppose you have hot oil and cold water, what kind fluid you flow In shell side and tube side and why?

5 Answers  

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As a chemical engineer, which are the subjects to whom more importance should be given....for technical interview.

4 Answers  

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Does home used kerosene which is available in blue color can change its color after keeping number of years (say 8-10 years)? If yes, then in which color will it turned to? Will it change to yellow color or transparent color? Please reply with suitable technical suggestion/approach. Its an important question which was asked. I need a very strong technical reply. Please help me.

0 Answers   BP,

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HOw to derive reynolds equation?

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can hydrogen vent to atm openly from cylinder

1 Answers   Deepak Fertilisers,

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What is difference between Piping Standard & Piping Specification ?

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I have Completed my B.Tech in Chemical Engineering from NIT Raipur, I want to prepare for HPCL Please Suggest me some books for Aptitude, Technical Questions & Please send me Previous Year Question Papers.

3 Answers   HPCL,

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What are the types of clarifier used in water treatement plant?

1 Answers   Adani,

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Define wet bulb globe temperature?

0 Answers  

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