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Explain why it is necessary to add a little flour to the water when boiling it to cook ugali.
(Solved)
Explain why it is necessary to add a little flour to the water when boiling it to cook ugali.
Date posted:
May 30, 2019
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Answers (1)
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A uniform rod of length 4m and mass of 4kg is pivoted at 3.6m mark. The rod is held horizontal with a vertical rope at...
(Solved)
A uniform rod of length 4m and mass of 4kg is pivoted at 3.6m mark. The rod is held horizontal with a vertical rope at the 4m
mark, as shown in the figure 3.0 below.
Calculate the tension, T in the rope (Take g = 10N/kg)
Date posted:
May 30, 2019
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Answers (1)
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A Spring extends by 0.7cm when a mass of 420g is hang on it on earth. By what length would the spring extend if the...
(Solved)
A Spring extends by 0.7cm when a mass of 420g is hang on it on earth. By what length would the spring extend if the same
set up was taken to the moon where the gravitational intensity is one-sixth of that one earth.Take gravitational field intensity on surface of Earth g, 10N/kg.
Date posted:
May 30, 2019
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Answers (1)
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The figure below shows a plane mirror and the word PHYSICS written on its front.
On the same diagram, write down the appearance of the word...
(Solved)
The figure below shows a plane mirror and the word PHYSICS written on its front.
On the same diagram, write down the appearance of the word after reflection on the mirror.
Date posted:
May 30, 2019
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Answers (1)
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Sketch the graph of density of water against temperature upto 10oC.
(Solved)
Sketch the graph of density of water against temperature upto 10oC.
Date posted:
May 30, 2019
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Answers (1)
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State one similarity between “moment of force about a point” and “work done”
(Solved)
State one similarity between “moment of force about a point” and “work done”
Date posted:
May 30, 2019
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Answers (1)
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The figure below shows a burette containing a liquid up to the level marked on the figure. 20 drops of the liquid are now run...
(Solved)
The figure below shows a burette containing a liquid up to the level marked on the figure. 20 drops of the liquid are now run out of the burette. If each drop has a volume of 1.1ml. Mark on the figure the new level of the liquid in the burette.
Date posted:
May 30, 2019
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Answers (1)
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The figure below shows a circuit diagram for a photocell.i) Explain why the milliammeter shows a deflection when ultraviolet light is shone on the photocell.ii)...
(Solved)
The figure below shows a circuit diagram for a photocell.
i) Explain why the milliammeter shows a deflection when ultraviolet light is shone on the photocell.
ii) Explain how the milliammeter reading is affected when the intensity of UV light is increased.
Date posted:
May 29, 2019
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Answers (1)
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The figure below shows four capacitors connected to a battery of 12 volts.
Calculate :
i) effective capacitance.
ii) charge on the capacitor of 3.2
iii) p.d across the...
(Solved)
The figure below shows four capacitors connected to a battery of 12 volts.
Calculate :
i) effective capacitance.
ii) charge on the capacitor of 3.2
iii) p.d across the capacitor of 5
iv) the energy stored by the capacitor of 2
Date posted:
May 29, 2019
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Answers (1)
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A student while investigating the focal length of a certain concave mirror, measured object and image distances
and drew a graph of 1/u against 1/v shown...
(Solved)
A student while investigating the focal length of a certain concave mirror, measured object and image distances
and drew a graph of 1/u against 1/v shown below.
From the graph, determine the focal length.
Date posted:
May 29, 2019
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Answers (1)
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What is meant by the term “topping” as applied to a lead acid accumulator ?
(Solved)
What is meant by the term “topping” as applied to a lead acid accumulator ?
Date posted:
May 29, 2019
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Answers (1)
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The figure below shows a ray of light XY striking the mirror CD held at an angle of 1080 to mirror DE.Complete the path of...
(Solved)
The figure below shows a ray of light XY striking the mirror CD held at an angle of 1080 to mirror DE.
Complete the path of the ray XY and state the final angle of reflection.
Date posted:
May 29, 2019
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Answers (1)
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The maximum wavelength of light required to cause photoelectric emission on a metal surface is 8.0×10-7. The metal surface is irradiated with light of freque4ncy...
(Solved)
The maximum wavelength of light required to cause photoelectric emission on a metal surface is 8.0×10-7. The metal surface is irradiated with light of freque4ncy 8.5 × 1014 Hz. Determine
i) The threshold frequency.
ii) The work function of the metal in electron volts.
iii) The maximum kinetic energy of the electron.
iv The maximum velocity of the emitted electrons.
(Take 1ev = 1.6×10-19J, C=3.0×108m/s, h=6.63×10-34Js and mass of electron = 9.11 × 10-31kg)
Date posted:
May 27, 2019
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Answers (1)
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The diagram below shows a magnetic material being magnetised.
Sketch a graph of magnetic strength against number of strokes for the material being magnetised on the...
(Solved)
The diagram below shows a magnetic material being magnetised.
Sketch a graph of magnetic strength against number of strokes for the material being magnetised on the grid below.
Date posted:
May 27, 2019
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Answers (1)
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Calculate the angle of refraction for a ray of light incident to an air-glass interface, making an angle of a 50° with the interface.
(Solved)
Calculate the angle of refraction for a ray of light incident to an air-glass interface, making an angle of a 50° with the interface.
Date posted:
May 27, 2019
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Answers (1)
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A gun is fixed upwards from the top of an open truck moving horizontally at a uniform velocity of 50m/s, the bullet achieved a maximum...
(Solved)
A gun is fixed upwards from the top of an open truck moving horizontally at a uniform velocity of 50m/s, the bullet achieved a maximum height of 45 m.
i) State with reason whether or not the bullet will land on the truck.
ii) Calculate the distance covered by the truck just before the bullet reached the same level from which it was fired.
Date posted:
May 27, 2019
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Answers (1)
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A simple hydrometer is made using a flat base test tube of mass 15g and length 12cm. The test tube is partly filled with lead...
(Solved)
A simple hydrometer is made using a flat base test tube of mass 15g and length 12cm. The test tube is partly filled with lead shots. Given that the test tube has a uniform cross section are of 2.0cm² and 10cm of its length is under water. Calculate
i) The mass of the lead shots in the test tube.
ii) The length of the test tube immersed if placed in brine which has a density of 1.25g/cm³
iii) The lowest density of liquid in which this test tube would float.
Date posted:
May 27, 2019
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Answers (1)
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The diagram below shows a wooden block of dimensions 50cm by 40cm by 20cm held in a position by a string attached to the bottom...
(Solved)
The diagram below shows a wooden block of dimensions 50cm by 40cm by 20cm held in a position by a string attached to the bottom of a swimming pool.
i) The three forces acting on the block are the tension (T) in the string, the weight (W) of the block and the upthrust (U) due to water.
Write an equation relating T, W and U when the block is at stationary.
ii) What is the weight of the block.
iii) What is the weight of the water displaced by the block.
iv) Determine the tension (T) on the string. (density of the block is 600kgm-3; density of water is 1000kgm-3)
Date posted:
May 27, 2019
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Answers (1)
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In the diagram below, find the pressure of the air in the tube X in the mmHg. The liquid shaded is mercury and the atmospheric...
(Solved)
In the diagram below, find the pressure of the air in the tube X in the mmHg. The liquid shaded is mercury and the atmospheric pressure is 760mmHg.
Date posted:
May 27, 2019
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Answers (1)
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The paddle wheel in the diagram below is made of a light material and fixed on a well oiled pivot.
What will happen to the wheel...
(Solved)
The paddle wheel in the diagram below is made of a light material and fixed on a well oiled pivot.
What will happen to the wheel when water is being heated?
Date posted:
May 27, 2019
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Answers (1)