Three children,each of weight 356 N , make a log raft by lashing together logs of diameter 0.30 m and length 1.80 m .How many logs will be needed to keep them floating in fresh water? Take the density of the logs to be 800kg/`m^(3)`.

Three children, each of weight 356 N, make a log raft by lashing together logs of diameter 0.30 m and length 2.00 m. How many logs will be needed to keep them afloat in fresh water? Take the density of the logs to be 800 kg/ m^(3)

A block of wood weights 16 kg in air. A lead block which has apparent weight of 28 kg in water is attached to the block of wood, and both of them are submerged in water If their combined apparent weight in water is 19 kg find the density of wooden block in kg//m^(3) Take density of water =1000 kg//m^(3) .

A cubical block of side 0.5 m floats on water with 30% of its volume under water. What is the maximum weight that can be put on the block without fully submerging it under water? [Take, density of water = 10^(3) kg//m^(3) ]

A block of wood of density 500 kg//m^(3) has mass m kg in air. A lead block which has apparent weight of 28 kg in water is attached to the block of wood, and both of them are submerged in water. If their combined apparent weight in water is 20 kg , find the value of m . Take density of water =1000kg//m^(3)

(1)/(8) of the length of a log is damaged.A man cuts off (3)/(4) of the second part.If the log is 16m long.find the length of sound log left.

The length of a needle floating on water is 2.5 cm . The minimum force in addition to its weight needed to lift the needle above the surface of water will be (surface tension of water is 0.072 N//m )

How many iron rods each of length 14 m and diameter 4 cm can be made out of 0.88 m^(3) of iron ?

A block of ice of area A and thickness 0.5m is floating in the fresh water. In order to just support a man of 100kg . Find the area A . (the specific gravity of ice is 0.917 and density of water = 1000 kg//m^(3) )