A diver is \(10\) m below the surface of the water. The approximate pressure experienced by the diver is:
1. \(10^5\) Pa                   
2. \(2\times10^5\) Pa
3. \(3\times10^5\) Pa       
4. \(4\times 10^5\) Pa

Subtopic:  Pressure |
 66%
From NCERT
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A liquid drop at temperature T, isolated from its surroundings, breaks into a number of droplets. The temperature of the droplets will be–

1. equal to T
2. greater than T
3. less than T
4. either (1), (2) or (3) depending on the surface tension of the liquid.

Subtopic:  Surface Tension |
 55%
From NCERT
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Find the rate of flow of glycerin of density 1.25 × 103 kg/m3 through the conical section of a pipe, if the radii of its ends are 0.1 m and 0.04 m and the pressure drop across its length is 10 N/m2.
1. 3.14 × 10–4 m3/s 
2. 6.28 × 10–4 m3/s
3. 12.56 × 10–4 m3/s 
4. 1.57 × 10–4 m3/s

Subtopic:  Bernoulli's Theorem |
 61%
From NCERT
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A mercury-filled U–tube arrangement is connected to a bulb containing a gas. Atmospheric pressure is \(1.012 \times 10^5\) Pa and \(\mathrm{H}=0.05\) m.
    
Then:

1. gauge pressure at \(\mathrm{R}\) is nil.
2. gauge pressure at \(\mathrm{R}\) is \(6.56 \times10^3\) Pa.
3. gauge pressure at \(\mathrm{R}\) is \(1.08 \times10^5\) Pa.
4. pressure at \(\mathrm{R},\) \(\mathrm{Q},\) and inside the bulb is the same.
Subtopic:  Pressure |
 55%
From NCERT
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The pressure of water in a water pipe when tap is opened and closed are respectively \(3\times10^5\) Nm–2 and \(3.5\times10^5\) Nm–2. With open tap, the velocity of water flowing is:
              
1. \(10\) ms–1                           
2. \(5\) ms–1
3. \(20\) ms–1       
4. \(15\) ms–1

Subtopic:  Bernoulli's Theorem |
 77%
From NCERT
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Three liquids of densities \(d,\) \(2d\) and \(3d\) are mixed in equal proportions of weights. The relative density of the mixture is: 

1. \(11d \over 7\) 2. \(18d \over 11\)
3. \(13d \over 9\) 4. \(23d \over 18\)
Subtopic:  Properties of Fluids |
 74%
From NCERT
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A horizontal pipe line carries water in a streamline flow. At a point along the pipe where cross-sectional area is 10 cm2, the velocity of water is 1 m/s and pressure is 2000 Pa. The pressure of water at another point where cross-sectional area is 5 cm2, is: (Density of water=1000 kg/m3)

1.  250 Pa

2.  500 Pa

3.  1000 Pa

4.  2000 Pa

Subtopic:  Bernoulli's Theorem |
 77%
From NCERT
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A soap bubble, having a radius of \(1~\text{mm}\), is blown from a detergent solution having a surface tension of\(2.5\times 10^{-2}~\text{N/m}\). The pressure inside the bubble equals at a point \(Z_0\) below the free surface of the water in a container. Taking \(g = 10~\text{m/s}^{2}\), the density of water \(= 10^{3}~\text{kg/m}^3\), the value of \(Z_0\) is:

1. \(0.5~\text{cm}\) 2. \(100~\text{cm}\)
3. \(10~\text{cm}\) 4. \(1~\text{cm}\)
Subtopic:  Surface Tension |
 55%
From NCERT
NEET - 2019
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A small hole of an area of cross-section \(2~\text{mm}^2\) is present near the bottom of a fully filled open tank of height \(2~\text{m}\). Taking \(g = 10~\text{m/s}^2\), the rate of flow of water through the open hole would be nearly:
1. \(6.4\times10^{-6}~\text{m}^{3}/\text{s}\)
2. \(12.6\times10^{-6}~\text{m}^{3}/\text{s}\)
3. \(8.9\times10^{-6}~\text{m}^{3}/\text{s}\)
4. \(2.23\times10^{-6}~\text{m}^{3}/\text{s}\)

Subtopic:  Bernoulli's Theorem |
 73%
From NCERT
NEET - 2019
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Fluid flows through a pipe in a horizontal plane. The fluid has a relative density of 0.9 and its velocity at P (where cross-section area is A) is 4 m/s. What is its pressure at Q? (where cross-section area is A4, The pressure at P is 2.8 x 105 Pa.)
      
1. 2.36 x 105 Pa
2. 3.88 x 105 Pa
3. 2.08 x 105 Pa
4. 1.72 x 105 Pa

Subtopic:  Bernoulli's Theorem |
From NCERT
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