Gce Model Questions Vol1 2020 Physics Question 21

Practice objective / multiple choice question 21 from the 2020 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2020 Physics Objective / Multiple Choice Medium Difficulty
Question 21 GCE_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • objective

A vertical tube of uniform cross‑section contains a trapped gas sealed at the bottom by a frictionless piston. The gas initially has pressure \(P_{0}=150\ \text{kPa}\) and volume \(V_{0}=2.0\times10^{-3}\ \text{m}^{3}\). The tube cross‑sectional area is \(A=5.0\times10^{-5}\ \text{m}^{2}\) and the tube is open to the atmosphere (\(P_{\text{atm}}=100\ \text{kPa}\)) at the top. Water is then slowly introduced at the top, raising the water column height \(h\) above the gas. Assuming the process is isothermal and the water density is \(\rho =1000\ \text{kg m}^{-3}\), determine the final pressure of the gas after equilibrium is reached.

Answer Options

A. 1.95\times10^{2}\ \text{kPa} \;(\approx 195\ \text{kPa})
Correct Answer B. 2.05\times10^{2}\ \text{kPa} \;(\approx 205\ \text{kPa})
C. 2.30\times10^{2}\ \text{kPa} \;(\approx 230\ \text{kPa})
D. 1.85\times10^{2}\ \text{kPa} \;(\approx 185\ \text{kPa})
Correct Answer
B
Correct Option:
2.05\times10^{2}\ \text{kPa} \;(\approx 205\ \text{kPa})

About This Question

This is Gce Model Questions Vol1 2020 Physics Question 21. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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