63. If an object moves at a non-zero constant acceleration for a certain interval of time, then the distance it covers in that time

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64. A solid dise and a solid sphere have the same mass and same radius. Which one has the higher moment of inertia about its centre of mass?

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65. Two substances of densities P, and P are mixed in equal volume and their relative density is 4. When they are mixed in equal masses, relative density is 3. The values of P1 and p respectively are

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66.car start from Agra, goes 50 km in straight line towards south, immediately turns around and returns to Agra. The time taken for this round trip is 2 hours. The magnitude of the avg velocity of car for this round trip

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67. "The sum of emf's and potential differences around a closed loop equals zero" is a consequence of

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68. A student measures certain lengths using a meter scale having least count equal to 1 mm. Which one of the following measurements is more precise?

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69. If the work done on the system or by the system is zero, which one of the following statements for a gas kept at a certain temperature is correct?

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70

77. Which one of the following is known as a zone of sharp salinity change in the vertical section of ocean?

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78. Permanent hardness of water cannot be removed by which one of the following methods?

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