Problem 9 If the viscosity of water at 70°C is 0.00402 poise and its specific gravity is 0.978 determine its absolute viscosity in Pa-s and its kinematic viscosity in m²/s and in stokes.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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Problem 9
If the viscosity of water at 70°C is 0.00402 poise and its specific gravity is 0.978 determine its
absolute viscosity in Pa-s and its kinematic viscosity in m²/s and in stokes.
Problem 10
An 18-kg slab slides down a 15° inclined plane on a 3 mm thick film of oil with viscosity
μ=0.0814 Pa-sec. if the contact area is 0.3 m², find the terminal velocity of the slab. Neglect air
resistance.
Problem 11
What is the value of the surface tension of a small drop of water 0.3 mm in diameter which is in
contact with air if the pressure within the droplet is 561 Pa?
Problem 12
An atomizer forms water droplets 45 µm in diameter. Determine the excess pressure within
these droplets using o=0.0712 N/m.
Problem 13
Distilled water stands in a glass tube of 9 mm diameter at a height of 24 mm. what is the true
static height? Use o=0.0742 N/m.
Problem 14
A sonar transmitter operates at 2 impulses per second. If the device is held to the surface of
fresh water (EB-2.04x10° Pa) and the echo is received midway between impulses, how deep is
the water?
Transcribed Image Text:Problem 9 If the viscosity of water at 70°C is 0.00402 poise and its specific gravity is 0.978 determine its absolute viscosity in Pa-s and its kinematic viscosity in m²/s and in stokes. Problem 10 An 18-kg slab slides down a 15° inclined plane on a 3 mm thick film of oil with viscosity μ=0.0814 Pa-sec. if the contact area is 0.3 m², find the terminal velocity of the slab. Neglect air resistance. Problem 11 What is the value of the surface tension of a small drop of water 0.3 mm in diameter which is in contact with air if the pressure within the droplet is 561 Pa? Problem 12 An atomizer forms water droplets 45 µm in diameter. Determine the excess pressure within these droplets using o=0.0712 N/m. Problem 13 Distilled water stands in a glass tube of 9 mm diameter at a height of 24 mm. what is the true static height? Use o=0.0742 N/m. Problem 14 A sonar transmitter operates at 2 impulses per second. If the device is held to the surface of fresh water (EB-2.04x10° Pa) and the echo is received midway between impulses, how deep is the water?
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