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Figure 11 shows an insulated cylinder fitted with a pressure gauge, a heating coil and a frictionless piston of cross-sectional area 100 cm2.

      

Figure 11 shows an insulated cylinder fitted with a pressure gauge, a heating coil and a frictionless piston of cross-sectional area 100 cm2.
physics52920171113.jpg
While the piston is at position O, the pressure of the enclosed gas is 10 Ncm-2 at a temperature of 27oC. when a 10 kg mass is placed on the piston, it comes to rest at position A without the temperature of the gas.
(i) Determine the new reading on the pressure gauge.
(ii) State with a reason how the value obtained in (i) compares with the initial pressure.

  

Answers


John
(i) P = $\frac{F}{A}$ = $\frac{100N}{100cm^2}$ = 1 N/ cm2

total pressure = 10N/cm2 + 1N/cm2 = 11 N/cm2

(ii) the pressure increases since the volume of gas decreases
johnmulu answered the question on May 29, 2017 at 08:18


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