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State the first law of refraction
Date posted:
September 20, 2017
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Why is the metre bridge method a more accurate means of measuring resistance than Ammeter-voltmeter method.
Date posted:
September 20, 2017
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State one reason why mercury is preferred as a barometric liquid and not water.
Date posted:
September 20, 2017
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Highlight one fact which shows that heat from the sun does not reach the earth's surface by
convection.
Date posted:
September 20, 2017
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The activity of a radioactive substance, initially at 400 counts per second reduces to 50 counts per
second in 72 minutes. Determine the half – life of the substance
Date posted:
September 19, 2017
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Distinguish between semiconductor and conductors
Date posted:
September 19, 2017
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Which instrument which can be used to measure the thickness of the hair.
Date posted:
September 19, 2017
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State the accuracy of a vernier caliper.
Date posted:
September 19, 2017
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State the difference between conductors and insulators
Date posted:
September 19, 2017
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Explain why boiling water is not used to sterilize clinical thermometer.
Date posted:
September 19, 2017
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State any two reasons why water is not a suitable thermometric fluid.
Date posted:
September 19, 2017
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State why concrete is usually reinforced with steel in the construction of beams.
Date posted:
September 19, 2017
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Explain why trees bends towards a busy highway.
Date posted:
September 19, 2017
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Differentiate between pressure and force
Date posted:
September 19, 2017
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State any two special rays used in the construction of ray diagrams
Date posted:
September 19, 2017
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A car can be brought to rest from a speed of 20 ms-1 in a time of 2s.
(i) Calculate the average deceleration
(ii) If the driver’s reaction time is 0.2s, determine the shortest stopping distance
Date posted:
September 19, 2017
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How are eddy currents in the transformer minimized?
Date posted:
September 19, 2017
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State three factors that affect the speed of sound in the air
Date posted:
September 19, 2017
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Define the term wave
Date posted:
September 19, 2017
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The number of molecules in 18cm^3 of a liquid is 6 x 10^23. Assuming that the diameter of the
molecules is equivalent to the side of a cube having the same volume as the molecule. Determine
the diameter of the molecule.
Date posted:
September 19, 2017
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State factors affecting the spring constant of the spring
Date posted:
September 19, 2017
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State factors that determine the force on a current carrying conductor on the magnetic field
Date posted:
September 19, 2017
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State any three characteristics of images formed by a convex mirror
Date posted:
September 19, 2017
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State two types of curved mirrors
Date posted:
September 19, 2017
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State any two factors the affect the stability of a body
Date posted:
September 19, 2017
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State the basic laws of magnetism
Date posted:
September 19, 2017
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Name three States of equilibrium
Date posted:
September 19, 2017
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What is the difference between longitudinal and transverse waves
Date posted:
September 19, 2017
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A copper calorimeter of mass 60g is filed with 100g of water at 250C. Steam at a normal
temperature and pressure ( N.T.P) is passed thought the water until a temperature 450C is attained.
The final mass of calorimeter and the contents was found to be 163.5g. Calculate the specific latent
heat of vaporization ‘l’ of water (Specific heat capacity for water is 4200JKg^-1 and for copper is 378Kg^-1K^1)
Date posted:
September 19, 2017
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A body moving initially at 50m/s decelerates uniformly at 2ms-2 until it comes to rest.
What distance does it cover from the time it started to decelerate
Date posted:
September 19, 2017