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ENTRANCE TEST – 2012 Multiple Questions and Answers.
| 17. | If ‘m’ is the mass, ‘c’ is the velocity of light and x = mc2, then dimensions of ‘x’ will be: | ||
| A. | [LT-1] | ||
| B. | [ML2T-2] | ||
| C. | [MLT-1] | ||
| D. | [MLT-2] | ||
| 18. | An object of mass ‘m’ is suspended in an elevator moving downward with acceleration equal to acceleration due to gravity. What is the apparent weight of object? | ||
| A. | Zero | ||
| B. | 2mg | ||
| C. | mg | ||
| D. | mg/2 | ||
| 19. | Stokes’ Law for steady motion in a fluid of infinite extent is given by | ||
| A. | F = 6πηrv | ||
| B. | F = (4/3)πr3ρg | ||
| C. | F = 6πηr2ρ | ||
| D. | F = 2gr2ρ/9η | ||
| 20. | If speed of efflux through a small hole in a large tank is 9.8 m/s. Find the height at the fluid above the hole | ||
| A. | 1 m | ||
| B. | 9.8 m | ||
| C. | 4.9 m | ||
| D. | 19.6 m | ||
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