Question 2. Visit a petrol pump , take to the person who fill air in the tyre. Ask him to show you the pressure guage he uses. Find out how pressure is needed for vehicle such as scooter, car, truck etc.

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Solution

The pressure in the tires are responsible to hold the force due to the weight of the vehicles. With increase in mass and size of the vehicles different sizes tire are used with different pressure. Try to find out how they differ from vehicle to vehicle.

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Question 3
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(a) Car
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Q. The figure shows a crude type of atomizer. When bulb A is compressed, air flows swiftly through tube BC causing reduced pressure in the particles of the vertical tube. The liquid rises in the tube, enters

BC and is sprayed out. If the pressure in the bulb is

P_{a} + P

, where

P

is the gauge pressure and

P_{a}

is the atmospheric pressure,

v

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v

need to be to cause the liquid to rise to BC.

(Density of air

= 1.3 k g / m^{3}

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