| 191. | Any boat will sink if it removes water from its- |
A. Equivalent to volume | |
B. Equivalent to the load | |
C. Page size | |
D. Density equivalent |
| 192. | To which country did the great scientist Archimedes belong? |
A. Britain | |
B. Germany | |
C. USA | |
D. Greece |
| 193. | The reason why water drops do not stick to oily surfaces is- |
A. Lack of adhesive force | |
B. Page tension | |
C. Can’t get along | |
D. Water is lighter than oil |
| 194. | Synchronizing satellite revolves around the earth- |
A. East to west | |
B. West to east | |
C. North to south | |
D. Descend from the south |
| 195. | The function of ball bearings in a wheel is |
A. Increase friction | |
B. Convert kinetic friction to rolling friction | |
C. Convert static friction to kinetic friction | |
D. Just for convenience |
| 196. | Consider the following statements about jet engines and rockets 1. A jet engine uses ambient air for its oxygen supply. Hence it is unsuitable for movement in space. 2. The rocket carries its oxygen supply in the form of gas and fuel. Which of the statements given above is/are correct? |
A. Only 1 | |
B. Only 2 | |
C. Both 1 and 2 | |
D. Neither 1 nor 2 |
| 197. | A piece of ice is floating in a glass of water when the ice melts what will happen to the level of the water |
A. Will grow | |
B. Will be less | |
C. Will remain the same | |
D. First increase then decrease |
| 198. | A ball is dropped from a tall building with a uniform acceleration of 9.8 m/s² What will be its velocity after 3 seconds |
A. 9.8 | |
B. 9.6 | |
C. 29.4 | |
D. 39.3 |
| 199. | The mass of an object is 100KG, if the acceleration due to gravity on the moon is 8e/6, then the mass of the object on the moon will be- |
A. 100/6 KG | |
B. 60 KG | |
C. 100 KG | |
D. 600 KG |
| 200. | The SI unit of power ‘Watt’ is equivalent to |
A. 1 kg⋅m2⋅s−3 | |
B. 1 kg⋅m2⋅s−9 | |
C. 1 kg⋅m2⋅s−6 | |
D. None of these |