A flask holds a gas whose pressure is below atmospheric pressure. Fig. 3.1 shows the apparatus being used to measure the gas pressure in the flask.
(a)[1]
State the name of the apparatus in Fig. 3.1 that measures the gas pressure.
(b)[2]
Determine the pressure of the gas contained in the flask.
(c)[1]
Describe what happens, if anything, to mercury level A and mercury level B as a result of the cooling.
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