1. Gas System A contains non-interacting molecules of negligible size at pressure P, whilst Gas Systems B and C contain large, strongly interacting molecules at pressures $10P$ and P/2, respectively.

Which line of the table correctly describes how closely the three systems resemble an ideal gas?

2. A body of water loses energy at a constant rate. Assume that the specific heat capacity of ice is half the specific heat capacity of liquid water.

Which graph shows a possible variation of temperature with time?

A.			B.
C.			D.

3. A circuit of a cell of electromotive force (emf) $18.0V$ and negligible internal resistance connected to three resistors of resistance $6.0\Omega$

The ammeter is ideal. What is the reading of the ammeter?

4. An ideal gas is enclosed in a syringe. The gas has a volume of 20 mL, a temperature of 20oC, and pressure of $10kPa$. The syringe is heated to 40oC, and the volume of the gas is reduced to 5 mL.

What is the new pressure?

5. A quantity of 2000 $kg$ Carbon Dioxide (CO2) is maintained in a container tank. The molar mass of Carbon Dioxide (CO2) is 44 g mol^−1. Determine the correct estimate of the number of Carbon Dioxide (CO2) molecules in the container tank.

6. An electric circuit is connected as shown. An electric current of $2A$ flows through the electric cell with an internal resistance $r$.

What is the value for $r$ ?

7. An ideal gas piston of total volume 900 cm^3 contains 600 cm^3 of air and 300 cm^3 of water at a temperature of 27°C. The system is cooled and the piston contracts at constant pressure.

What is the approximate total piston volume at the point where the water first starts to freeze?

8. A circuit is connected across a $12V$ battery which provides $60J$ of electrical energy per second.

What is the rate of charge flow across the conductor?

9. Which of the following pairs constitutes a renewable and non-renewable source of energy?

10. Under what conditions of density and pressure does the following graph represent how the volume of a real gas varies with temperature at constant pressure?

11. The following three statements give possible reasons why the average intensity of sunlight incident on a solar panel during a day on earth is only a fraction of the solar constant.

• I.	Scattering of sunlight in the atmosphere
  II.	Rotation of the earth
  III.	The surface of the solar panel is not perpendicular to incident of sunlight

Which of the statements are correct?

12. Electrons are accelerated between two conducting plates that have a potential difference of $100V$. Estimate the total energy that would be delivered to 10^21 electrons by the conducting plates.

13. The albedo at the poles of Earth during a particular day is 0.8. What is the value of the absorbed intensity if the solar intensity is 700 W m^−2?

14. A cell is connected to a variable resistor. The terminal potential difference (p.d.) and current through the cell are measured and plotted on the graph shown. What is the internal resistance of the cell?

15. An ideal gas is in a fixed volume container which sits on an electronic balance. More of the same gas is added to the container. Which of the following will not change?

16. The average radius of Neptune's orbit around the Sun is approximately 30 times the orbital radius of earth. Estimate the solar constant of Neptune.

17. An electron accelerates through a potential difference of $7kV$. How much work is done on the electron by the field?

18. On a certain day, the solar intensity on the Earth's surface is 300Wm^−2. Photovoltaic cells which have an efficiency of 20% are used to convert solar energy to electrical energy. What should be the minimum area of the photovoltaic cells to produce an output of 6.0$kW$ , assuming that the incident light is normal to the surface of the panel?

19. Which of the graphs below best describes the change in average kinetic energy of the molecules of a beaker of water as it is heated at a constant rate until it completely boils away?

A.			B.
C.			D.

20. A light dependent resistor (LDR) and a $10k\Omega$ resistor are connected in series to a $12V$ D.C supply as shown

When the LDR is in the dark it has a resistance of $20k\Omega$ . Which of the following gives the potential difference $V$ across the light dependent resistor under these conditions?

21. Which of the following is a non-renewable energy resource?

22. A student is using the equation $pV=nRT$ to solve for $n$ with the following percentage uncertainties in the measurements.

What is the percentage uncertainty in the calculated value of n?

23. Water of mass $m$ at an initial temperature of 20 oC is provided with thermal energy at a rate $P$. Its temperature rises to 30 oC in time $t$.

The rate of energy transfer is doubled and the mass of the water is halved. What is the final temperature, in time $t$, if the initial temperature is again 20 oC?

24. Which of the following energy resources is non-renewable?

25. Two ideal gases $A$ and $B$ of molar masses mA>mB are initially at absolute temperatures TA. The gases are mixed together. Which of the following is correct about the average random speeds vA and vB of the molecules of A and B before and after thermal equilibrium is attained?