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| Q. |
Which among the following is the formula for Knudsen number? |
| A. | λ⁄l |
| B. | λ⁄2l |
| C. | λ⁄3l |
| D. | λ⁄4l |
| Answer» A. λ⁄l | |
| Explanation: the formula for knudsen number is λ⁄l. knudsen number in fluid mechanics deals with gas dynamics. it is defined as the ratio of the molecular mean free path length to the representative scale length. | |
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