Question

Which of the following statements is/are true?

• A. ( {Hagen-Poiseuille's law is used for calculation of molecular diffusion.} )
• B. ( {Fick's law is used for calculation of energy requirement in size reduction.} )
• C. ( {Rittinger's law is used for calculation of energy requirement in size reduction.} )
• D. ( {Stokes law is used for derivation of terminal velocity.} )

Hint:

Understanding the context and application of fundamental laws is essential for accurate problem-solving in engineering and scientific disciplines.

Answer 1

The Correct Option is C

- Hagen-Poiseuille’s law (A): This law is used for the calculation of fluid flow through a pipe under laminar flow conditions, not molecular diffusion. Hence, this statement is false. 
- Fick's law (B): Fick's law describes diffusion processes, not the energy requirements for size reduction. Hence, this statement is false. 
- Rittinger's law (C): This law is used to calculate the energy required for size reduction, assuming the energy is proportional to the increase in surface area. Hence, this statement is true. 
- Stokes law (D): Stokes law is used to derive terminal velocity for spherical particles settling in a fluid under the influence of gravity. Hence, this statement is true.