Questions in Mechanical Properties of Fluids

Select	Question
	Two solids A and B float in water. It is observed that A floats with $\frac{1}{2}$ of its body immersed in water and B floats with $\frac{1}{4}$ of its volume above the water level. The ratio of the density of A to that of B is
	A boat carrying steel balls is floating on the surface of water in a tank. If the balls are thrown into the tank one by one, how will it affect the level of water
	Two pieces of metal when immersed in a liquid have equal upthrust on them; then
	A wooden cylinder floats vertically in water with half of its length immersed. The density of wood is
	A candle of diameter d is floating on a liquid in a cylindrical container of diameter D (D>>d) as shown in figure. If it is burning at the rate of 2cm/hour then the top of the candle will
	An ice block contains a glass ball when the ice melts within the water containing vessel, the level of water
	A large ship can float but a steel needle sinks because of
	Construction of submarines is based on
	In which one of the following cases will the liquid flow in a pipe be most streamlined
	Two water pipes of diameters 2 cm and 4 cm are connected with the main supply line. The velocity of flow of water in the pipe of 2 cm diameter is