| 01. | A body that is falling freely from a height (no air resistance)under the influence of gravity is ? Increases its speed by about 32 ft/sec. during each second it falls |
| 02. | A glass rod placed in a colorless liquid seems to disappear because ? Both have the same refraction index |
| 03. | Centigrade & Fahrenheit scales give same reading at ? -40 |
| 04. | Effiency of engine is usually expressed in ? Percentage |
| 05. | Fathom is the unit of measurement of ? Depth of water |
| 06. | On a hot day if you are sweating, you will feel cooler than on a cooler moist day. This is because ? The evaporation of sweat on a hot day causes more Cooling |
| 07. | Pure water does not conduct electricity because it is ? Neutral |
| 08. | Sun can see for some time even after sunset, Which is the principle with which this phenomena ? Refraction of Light |
| 09. | The falling drop of rain water acquires the spherical shape is due to ? Surface Tension |
| 10. | The instrument, which is used to measure Viscosity is called ? Venchuri meter |
| 11 | The lowest temperature beyond which matter is not able to cooled ? -273 Degree Centigrade |
| 12. | The luster of diamond is due to ? Total internal reflection |
| 13. | The sop lather due to ? Surface tension |
| 14. | The speed required to escape gravity of the earth is ? 11.2 km / Second |
| 15. | The speed required to escape gravity of the moon is ? 2.4 km / Second |
| 16. | Through which media does light travel fastest ? Vacuum |
| 17. | When an object is placed between two parallel mirror, the number of images will be ? Infinite |
| 18. | Which are the component colors of yellow ? Red & Green |
| 19. | Which instruments is used for measuring the approximate height above ground level ? Altimeter |
| 20. | Which particle travel faster than light ? Tachyon |
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