2. In place 'P' due to the excessive cool the time of a second pendulumis changed in such a way that, it goes fast per day. Then this pendulum is brought in another place ' ' at the same temperature. Theacceleration due to gravity is decreased by in place ' ' then the place ' '.
3. To measure the depth of a lake of saline water, a diver takes a balloon filled with one mole of helium gas of volume at pressure to the bottom from the lake surface and finds that the volume decreases to half of its initial volume. At this the diver remarks that the depth of the lake is . It is mentioned that the temperature of gas and lake water is same. [Density of lake water , Air pressure at the lake surface
4. A car of mass is taking turn on a road of width. The outer end of the road is higher than the inner end. Radius of the track is . The passengers request the driver to drive the car at the velocity .
5. A wheel of mass and radius rotates 60 times per minute. A torque is applied to wheel to stop within 5 seconds.