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If it is,then what about the pressure and velocity in a pipe having dia 10cm up to certain length and if that pipe dia is reduced linearly from 10cm to 1cm?And again from 1cm to completed closed one?

In static liquid pressure is caused dy gravitation or weight forces?And can weight is also be a predominant factor that cause pressure during liquid flow?

We know Force F is directly proportional to pressure and to change in velocity w.r.t to time as per Newton 2nd law then how can pressure and velocity can be inversely proportional during fluid flow