K.C.S.E Physics Q & A - MODEL 2018PP1QN04

K.C.S.E Physics Q & A - MODEL 2018PP1QN04

​Figure 2 shows an instrument used to measure atmospheric pressure.

​State with a reason the modification that would be required in a similar set up if mercury were to be replaced with water.

answer

• The tube will be very long since water has much lower density than mercury.