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NEET2019PhysicsMechanical Properties of FluidsActual

In a u-tube as shown in a figure, water and oil are in the left side and right side of the tube respectively. The heights from the bottom for water and oil columns are 15 ~cm and 20 ~cm respectively. The density of the oil is [ . take . _ water =1000 ~kg / m ^3 ]

Options

  1. A1200 ~kg / m ^3
  2. B750 ~kg / m ^3
  3. C1000 ~kg / m ^3
  4. D1333 ~kg / m ^3

Correct answer

B. 750 ~kg / m ^3

Step-by-step solution

According to Pascal's law "Pressure applied to an enclosed fluid is transmitted undiminished to every point of the fluid and the walls of the containing vessel." In the given situation as shown in the figure below Pressure due to water column of height 15 ~cm = Pressure due to oil column of height 20 ~cm aligned h _ w _ w g & = h ₀ ₀ ~g 15 _w & =20 ₀ ₀= 15 20 _ ₀ & = 15 20 1000 ( given, _w=1000 ~kg ~m ⁻³ ) & =750 kgm ⁻³ aligned

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