Keep the angular velocity of the table constant. The centripetal force is provided by hanging masses. The mass of body is measured and maintained constant throughout the experiment. A known mass is added and the table is allowed to rotate until the body attains a constant radius, r. This radius is measured and the experiment is repeated for other masses.
johnmulu answered the question on June 2, 2017 at 05:13
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State the focal length of the lens.
Date posted: May 29, 2017. Answers (1)
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Name the defect and state the cause of this defect.
Date posted: May 29, 2017. Answers (1)
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Figure 12 shows the features of a simple camera.
(i) Name the parts labeled A and B.
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(iii) State the functions of the shutter and the parts labeled A and B
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Figure 8 shows an experimental set-up consisting of a mounted lens L, a screen, S, a meter rule and a candle.
(i) Describe how the set-up may be used to determine the focal length, f, of the lens.
(ii) State the reason why the set-up would not work if the lens were replaced with a diverging lens.
Date posted: May 29, 2017. Answers (1)
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Date posted: May 29, 2017. Answers (1)
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The pressure acting on a gas in a cylinder was changed steadily while the temperature of the gas was maintained constant. The value of volume V of the gas was measured for various values of pressure. The graph in Figure 11 shows the relation between the pressure P, and the reciprocal of volume, $\frac{1}{V}$
(i) Suggest how the temperature of the gas could be kept constant.
(ii) What physical quantity does K represent?
(iii) State one precaution you would take when performing such an experiment.
Date posted: May 29, 2017. Answers (1)
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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.
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.
Date posted: May 29, 2017. Answers (1)
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The tube is now held in a vertical position with the open end facing upwards as shown in figure 8.
Determine:
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(ii) The length (l) of the enclosed air column.
Date posted: May 29, 2017. Answers (1)
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Date posted: May 29, 2017. Answers (1)
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Date posted: May 29, 2017. Answers (1)
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(i) State the reason why the volume increases as the bubble rises in the liquid column.
(ii) From the graph, determine the pressure on the bubble:
(I) at the bottom of the liquid column;
(II) at the top of liquid column
Date posted: May 29, 2017. Answers (1)
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The graph in Figure 11 shows the relationship between volume and temperature for the experiment.
(i) What was the volume of the gas at 0o?
(ii) At what temperature would the volume of the gas be zero?
(iii) Explain why the temperature in part (ii) above cannot be achieved.
Date posted: May 29, 2017. Answers (1)
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State two factors that are kept constant, in order to determine the relationship.
Date posted: May 29, 2017. Answers (1)
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The graph in figure 7 shows the relationship between the pressure and temperature for an ideal gas. use the information in the figure to answer questions (a)and(b).
(a) State the unit of the horizontal axis.
(b) Write a statement of the gas law represented by the relationship.
Date posted: May 29, 2017. Answers (1)
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The pressure acting on a gas in a container was changed steadily while the temperature of the gas was maintained constant. The value of volume V of the gas was measured for various values of pressure. The graph in Figure 9 shows the relation between the pressure, P, and reciprocal of volume, $\fracf{1}{V}$
(i) Suggest how the temperature of the gas could be kept constant.
(ii) What physical quantity does k represent?
(iii) State one precaution you would take when performing such an experiment.
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Figure 6 shows a simple set up for pressure law apparatus.
Describe how the apparatus may be used to verify pressure law.
Date posted: May 29, 2017. Answers (1)
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Figure 7 shows an experiment set-up that may be used to investigate one of the laws. The glass tube has a uniform bore and it is graduated in millimeters.
(i) Describe how the experiment is carried out and explain how the results obtained verify the law.
(ii) State two limitations of the set-up.
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Figure 5 shows a set up that ,a set up that may be used to verify Charles' law.
(i) State the measurements that should be taken in the experiment.
(ii) What is the purpose of the water bath?
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Describe the measurements that should be taken in the experiment.
Date posted: May 27, 2017. Answers (1)
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Figure 8 shows a graph of the variation of temperature with time for a pure substance heated at a constant rate.
Assuming that heat transfer to the surroundings is negligible, state the changes observed on the substance in region:
(a) BC;
(b) DE
Date posted: May 27, 2017. Answers (1)