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qUESTIONS

MCQs-PYQs-12th-jee

Two non-mixing liquids of densities p and np(n ) 1) are put in a container. The height of each liquid is h. A solid cylinder of length Land density d is put in this container. The cylinder floats with its axis vertical and length pL(p ( 1) in the denser liquid. The density d is equal to

MCQs-PYQs-12th-jee

A U tube with both ends open to the atmosphere, is partially filled with water. Oil, which is immiscible with water, is poured into one side until it stands at a distance of 10 mm above the water level on the other side. Meanwhile the water rises by 65 mm from its original level (see diagram). The density of the oil is

MCQs-PYQs-12th-jee

The value of coefficient of volume expansion of glycerine is 5 * 10 ^ – 4 * k ^ – 1 The fractional change in the density of glycerine for a rise of 40°C in its temperature is

MCQs-PYQs-12th-jee

The heart of man pumps 5 litres of through the arteries per minute at a pressure of 150 mm of mercury. If the density of mercury be 13.6×10 kg/m³ and g = 10m/s² the power of heart in watt is

MCQs-PYQs-12th-jee

Bernoulli’s equation is based on the law of conservation of

MCQs-PYQs-12th-jee

According to Bernoulli’s equation (P/pg)+h+1/2(v^2/g) = constant. The terms A, B and C are generally called respectively

MCQs-PYQs-12th-jee

The working of an atomizer depends on

MCQs-PYQs-12th-jee

Water containing air bubbles flows without turbulence through a horizontal pipe which has a region of narrow cross – section. In this region the bubbles

MCQs-PYQs-12th-jee

A liquid flow through a horizontal tube. The velocities of the liquid in the two sections, which have areas of cross-section A₁ and A2, are v₁ and v₂ respectively. The difference in the levels of the liquid in the two vertical tubes is h

MCQs-PYQs-12th-jee

In this figure, an ideal liquid flows through the tube, which is of uniform cross-section. The liquid has speed VA and VB, and pressure PA and PB at points A and B respectively

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