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The diagram below shows the behaviour of mercury in a capillary tube.
(Solved)
The diagram below shows the behaviour of mercury in a capillary tube.
Explain the behaviour.
Date posted:
November 13, 2019
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Answers (1)
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The figure below shows a vernier calipers scale.
(Solved)
The figure below shows a vernier calipers scale.
State the correct reading of scale if the instrument has a zero-error of -0.02cm
Date posted:
November 13, 2019
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Answers (1)
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student obtained ice at 0 degrees C from a refrigerator and placed it in a beaker on a bench. After 4 minutes, the temperature rose...
(Solved)
student obtained ice at 0 degrees Cfrom a refrigerator and placed it in a beaker on a bench. After 4 minutes, the temperature rose to 4 degrees C. State the changes that would be observed in the water in terms of;
(i) density
(ii) mass
(ii) volume
Date posted:
November 7, 2019
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Answers (1)
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The minimum frequency of light that causes photoelectric emission from a metal surface is 6.4 x 1014Hz . When the surface is irradiated with a...
(Solved)
The minimum frequency of light that causes photoelectric emission from a metal surface is 6.4 x 1014Hz . When the surface is irradiated with a certain source , electrons are dislodged With a speed of 7.2 x 105m/s.Given that h = 6.63 x 10-34Js and m = 9.11 x 10-31kg , calculate
i) The work function of the metal
ii) The maximum kinetic energy of the photoelectrons
Date posted:
November 4, 2019
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Answers (1)
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Draw the electric field pattern between the positive point charge and the negatively charged plate in figure below.
(Solved)
Draw the electric field pattern between the positive point charge and the negatively charged plate in figure below.
Date posted:
November 4, 2019
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Answers (1)
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Draw labeled diagram of a simple a.c generator.
(Solved)
Draw labeled diagram of a simple a.c generator.
Date posted:
November 4, 2019
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Answers (1)
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In an experiment to determine the focal length of a concave mirror, magnification M was determined for various image distance V. The figure below shows...
(Solved)
In an experiment to determine the focal length of a concave mirror, magnification M was determined for various image distance V. The figure below shows a graph of magnification M against image distance V for the results from the experiment.
Use the graph to determine:
i) The focal length ,f of the mirror, given that M= 1 - v/f
ii) The image distance when the magnification is 0.6.
Date posted:
November 4, 2019
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Answers (1)
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State what happens to the wavelength of a water wave when it moves from shallow to deep water.
(Solved)
State what happens to the wavelength of a water wave when it moves from shallow to deep water.
Date posted:
November 4, 2019
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Answers (1)
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Draw a circuit diagram showing how a single diode can be used in half wave rectification.
(Solved)
Draw a circuit diagram showing how a single diode can be used in half wave rectification.
Date posted:
November 4, 2019
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Answers (1)
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The table below shows data collected during investigation of Hooke’s law.
a). Complete the table.
b). Using the data in the table, plot a graph of force,...
(Solved)
The table below shows data collected during investigation of Hooke’s law.
a). Complete the table.
b). Using the data in the table, plot a graph of force, F against extension, e in the attached gird below.
c). On the graph, indicate X, at the elastic limit
d). From the graph, determine the elastic spring constant for the material.
Date posted:
November 4, 2019
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Answers (1)
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What is the difference between uniform linear motion and uniform circular motion?
(Solved)
What is the difference between uniform linear motion and uniform circular motion?
Date posted:
November 4, 2019
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Answers (1)
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The figure below shows a 4m long uniform metal rod balanced horizontally when two forces act on it as shown.
Determine the value of F given...
(Solved)
The figure below shows a 4m long uniform metal rod balanced horizontally when two forces act on it as shown.
Determine the value of F given that the rod weighs 8 N.
Date posted:
November 4, 2019
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Answers (1)
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The temperature of water in a measuring cylinder is raised from 0oC to 15oC. Sketch the graph of volume against temperature.
(Solved)
The temperature of water in a measuring cylinder is raised from 0oC to 15oC. Sketch the graph of volume against temperature.
Date posted:
November 4, 2019
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Answers (1)
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The micrometer screw gauge shown in figure below had a zero error of – 0.05 mm and was used to measure the diameter of a...
(Solved)
The micrometer screw gauge shown in figure below had a zero error of – 0.05 mm and was used to measure the diameter of a steel ball bearing.
Find the radius of the ball bearing whose diameter is recorded by the instrument.
Date posted:
November 4, 2019
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Answers (1)
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Why do you think we experience more discomfort in hot humid weather than we do in hot dry weather.
(Solved)
Why do you think we experience more discomfort in hot humid weather than we do in hot dry weather.
Date posted:
October 30, 2019
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Answers (1)
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In demagnetization by electrical method:
i) State the type of current used.
ii) Explain your answer in (i) above.
(Solved)
In demagnetization by electrical method:
i) State the type of current used.
ii) Explain your answer in (i) above.
Date posted:
October 30, 2019
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Answers (1)
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The figure below shows a method of magnetization used in making magnets.
i)Name the method.
ii) Identify the polarities A and B of the magnet produced.
iii) Apart...
(Solved)
The figure below shows a method of magnetization used in making magnets.
i)Name the method.
ii) Identify the polarities A and B of the magnet produced.
iii) Apart from this method, state any other method used in magnetization.
Date posted:
October 30, 2019
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Answers (1)
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A surface whose work function is 2.46eV is illuminated by light of frequency 3.0×1015Hz. Calculate the maximum kinetic energy of the ejected photoelectrons.
(Solved)
A surface whose work function is 2.46eV is illuminated by light of frequency 3.0×1015Hz. Calculate the maximum kinetic energy of the ejected photoelectrons.
Date posted:
October 30, 2019
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Answers (1)
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The figure below shows the essential components of an x-ray tube
a)Name the parts labelled A and B.
b)Explain how electrons are produced.
c)During the operation of the...
(Solved)
The figure below shows the essential components of an x-ray tube
a)Name the parts labelled A and B.
b)Explain how electrons are produced.
c)During the operation of the tube, the target becomes very hot.
i)Explain how this heat is caused.
ii)State any two ways in which cooling can be achieved.
d)Explain why:
i)The tube is evacuated.
ii)The cathode is concave shaped.
Date posted:
October 30, 2019
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Answers (1)
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A transformer uses 240V a.c supply to deliver 9.0A at 80V to a heating coil. If 10% of the energy taken from the supply is...
(Solved)
A transformer uses 240V a.c supply to deliver 9.0A at 80V to a heating coil. If 10% of the energy taken from the supply is lost in the transformer itself, determine the current in the primary winding.
Date posted:
October 30, 2019
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Answers (1)