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A gun is fired and an echo heard at the same place 0.6s later. How far is the barrier, which reflected the sound from the gun? (Speed of sound in air=330ms-1
Date posted:
May 20, 2019
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Figure below shows two plane mirrors inclined at an angle x from each other. A viewer counts a total of seven images by looking directly from the object O. Determine value of angel x.
Date posted:
May 20, 2019
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Calculate the volume of hydrogen gas produced at s.t.p when 1.15g of sodium metal
react with water. (Na=23, molar gas volume=22400cm3)
Date posted:
May 20, 2019
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What is the function of calcium chloride during extraction of sodium metal?
Date posted:
May 20, 2019
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A piece of wire of length 12m is stretched through 2.5cm by a mass of 5 kg. assuming that the wire obeys the Hookes law, what force will stretch it through 4.0 cm.
Date posted:
May 20, 2019
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An object of the mass 150kg moving at 20m/s collides with a stationary object of mass 90kg.They couple after collision .Determine the :
(i) Total momentum before collision
(ii) Total momentum after collision
(iii) Their common velocity after collision
Date posted:
May 20, 2019
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The figure below shows a metallic rod of length 10cm and uniform cross-sectional area 4cm2 suspended from spring balance with 7.5 cm of its length immersed in water. The density of the material is 1.5g/cm3.The density of water is 1 g/cm3
Determine:
i) The mass of the rod
ii) The upthrust acting on the rod
iii) The reading 0f the spring balance
iv) The reading of the spring balance when the rod is wholly immersed in water
Date posted:
May 20, 2019
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In an experiment to electroplate a copper spoon with silver, a current of 0.5A was passed for 18 minutes. Calculate the amount of silver deposited on the spoon ( IF =96500 coulombs,Ag=108)
Date posted:
May 20, 2019
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On the axis provided sketch a graph of mechanical advantage (MA) against load for a pulley
system
Date posted:
May 20, 2019
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Water flows steadily along a horizontal pipe at a volume rate of 8.0×10-3m3/s.If the cross-section area of the pipe is 20cm2. Calculate the velocity of the fluid.
Date posted:
May 20, 2019
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State two practical applications of stability
Date posted:
May 20, 2019
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Study the diagram below and answer the questions that follow.
When some hydrogen chloride gas is allowed into water and the mixture stirred, the bulb lights and gasses X and Y are formed.
(a) Name
(i) Gas X
(ii) Gas Y
(b) Explain why the bulb does not light before the chloride gas is let into the water
Date posted:
May 20, 2019
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The structure of ammonium ion is shown below
Name the type of bond represented in the diagram by N-----> H
Date posted:
May 20, 2019
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Discuss the colonial policies affecting education
Date posted:
May 20, 2019
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You are provided with a test – tube, thread and a meter ruler. Outline the steps you would use to measure the circumference and hence the diameter of the test – tube.
Date posted:
May 20, 2019
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Give a reason why ammonia gas is highly soluble in water.
Date posted:
May 20, 2019
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Discuss the development of western education.
Date posted:
May 20, 2019
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The figure below shows a rubber sucker, explain why the sucker sticks on a clean flat
Surface.
Date posted:
May 20, 2019
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List the methods of instruction of the African indigenous Education.
Date posted:
May 20, 2019
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A micrometer screw gauge has a zero error of -0.03mm. It is used to measure the diameter of a wire. If the actual diameter of the wire is 0.30mm, draw the micrometer screw gauge showing the measured diameter of the wire.
Date posted:
May 20, 2019
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List the main aims of indigenous education.
Date posted:
May 20, 2019
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Explain the radical and progressive education in the 20th century.
Date posted:
May 20, 2019
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Discuss educational movements of 19th and 20th century.
Date posted:
May 20, 2019
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A mass of 56g a saturated solution of salt X at 250C yield 14g of the solid when
evaporated to dryness. What is the solubility of the salt at 250C.
Date posted:
May 20, 2019
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The extraction of aluminium from its ore takes place in two stages, purification stage
and electrolysis stage. The diagram below shows the set up for the electrolysis stage.
(a) Name the ore from which aluminium is extracted.
(b) Name one impurity which is removed at purification stage.
(c) Label on the diagram each of the following:
Anode
Cathode
Region containing the electrolyte
(d) The melting point of aluminium oxide is 20540C but electrolysis is done between 8000C -
9000C.
(i) Why is the electrolysis not carried out at 20540C.?
(ii) What is done to lower the temperature of the electrolysis cell to 8000C - 9000C?
(iii) The aluminium which is produced is tapped off as liquid. What does this imply
about its melting point?
(e) A typical electrolysis cell uses a current of 40000 ampheres. Calculate the mass (in kilograms) of aluminium produced in one hour.
Date posted:
May 20, 2019
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List the achievements of Renaissance.
Date posted:
May 20, 2019
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Outline the factors that led to the rise of universities.
Date posted:
May 20, 2019
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List the factors that led to scholasticism.
Date posted:
May 20, 2019
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The flow chart below outlines some of the process involved during extraction of copper.
a) (i) Write the formula of copper pyrite.
(ii) Name liquid T
(iii) Write equations for the reactions taking place in the 2nd roasting furnace.
(iv) Identify substance B and write equation for the reaction that take place in the smelting furnace.
(v) State the purpose of substance F.
Date posted:
May 20, 2019
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Give the aims of Islamic education.
Date posted:
May 20, 2019