A water manometer is connected to a gas supply.
There is a gas leak and the pressure of the gas supply falls.
What happens to the water level at P and what happens to the water level at Q?
1 )
water level at P:falls / water level at Q:falls
2 )
water level at P:falls / water level at Q:rises
water level at P:rises / water level at Q:falls
4 )
water level at P:rises / water level at Q:rises
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