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Briefly explain what happen during power on self test (POST)
Date posted:
October 1, 2019
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When zinc is heated to redness in a current of steam, hydrogen gas is obtained. Write an equation for the reaction
Date posted:
October 1, 2019
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In an experiment, 100g of hot water at 90oC was mixed with 20g of ice at 0oC in a lagged plastics colorimeter. After stirring, all the ice melted and the temperature of the mixture was found to be 61.5oC. Determine the latent heat of fusion of ice
(Specific heat capacity of water =4200Jkg-1k-1)
Date posted:
October 1, 2019
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Hydrogen burns in oxygen to form an oxide.
(i) Write an equation for the reaction
(ii) State two precautions that must be taken before the combustion begins and at the end of
the combustion.
Date posted:
October 1, 2019
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Hydrogen can be prepared by reacting zinc with dilute hydrochloric acid.
a) Write an equation for the reaction.
b) Name an appropriate drying agent for hydrogen gas.
c) Explain why copper metal cannot be used to prepare hydrogen gas.
Date posted:
October 1, 2019
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A student set-up the apparatus as shown below to determine the power of an electric heater
(i) Other than time, state the measurements that would be used to determine the quantity of heat P absorbed by ice in a unit time
(ii) Complete the circuit to show the connection of the essential circuit components
(iii) Describe how the student would proceed to determine P
(iv) Give a reason why P may not be equal to the value indicated by the manufacturer
Date posted:
October 1, 2019
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Explain how submerged hydrophytes obtain their oxygen for respiration at night
Date posted:
October 1, 2019
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Name the process which occurs in mammalian liver that lead to formation of urea
Date posted:
October 1, 2019
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State the functional differences between pulmonary artery and pulmonary vein.
Date posted:
October 1, 2019
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The readings tabulated below shows how the length of a helical spring varied with the load hanging on it
(i) Complete the table to show the values of extension
(ii) Draw a graph of extension (y-axis) against load for the spring
(iii) Determining form the graph the proportionality constant of the spring
Date posted:
October 1, 2019
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Explain how a genetic trait is inherited in a mammal.
Date posted:
October 1, 2019
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Explain why a breastfeeding woman generally require more protein in her daily diet than a normal woman.
Date posted:
October 1, 2019
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The diagram below shows two trolleys, A and B connected to each other by an elastic strip of negligible mass. The trolleys are pulled apart on a smooth plane till tension in the elastic strip is 4.0N and are then released suddenly
(a) State with reason the total momentum of the trolleys when they are just released
(b) Calculate the initial acceleration of trolley A when released
(c) The velocity of the trolley B is 0.9ms-1 just before it collides with A. Determine the velocity of A just before the collision
(d) Which trolley covers a longer distance before collision? Explain
(e) Explain why the elastic strip may not stretch to the same original length after impact
Date posted:
October 1, 2019
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Business studies are a wide subject that covers several disciplines. Outline those five disciplines.
Date posted:
October 1, 2019
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Fill in the blank spaces below.
Date posted:
October 1, 2019
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State and explain the following types of relationship as used in database design
Date posted:
October 1, 2019
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A student holds a sheet of paper at an end so that it hangs in the position A as shown below
Explain why the paper rises to the position B when the student blows air in the direction shown by the arrow
Date posted:
October 1, 2019
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State the following abbreviations in full
(i)GDP
(ii)GNP
(iii)NDP
(iv)NNP
Date posted:
October 1, 2019
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State the following types of transcription errors:
i. 3455 instead of 3456
ii. Simth instead of Smith
Date posted:
October 1, 2019
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Mention whether the following transactions have an increase, decrease or no effect on the assets, capital and liabilities of a business
Date posted:
October 1, 2019
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The figure below shows a sheet of material with the shape of an isosceles triangle. Mark its centre of gravity accurately showing how you arrive at the answer
Date posted:
October 1, 2019
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Kiburu carried out the following transactions during the month of February 2015.
February 1: Started business by depositing sh 220,000 in business bank account
7: Bought goods on credit from Miyogo Sh 72,000
8: Paid rent by cheque Sh 20,000
16: Sold goods to Kamula on credit Sh 50,000.
Required: Post the above transaction in the relevant ledge accounts
Date posted:
October 1, 2019
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Using one’s complement, calculate 510 – 910. Use six bit in your calculation.
Date posted:
October 1, 2019
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A u-tube vertically holds two liquids L1 and L2 as shown in the figure below
(a) Mark accurately the point in liquid L2 that is at the same pressure as point P
(b) Determine the number of times L1 is denser than L2
Date posted:
October 1, 2019
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Convert 3BD16 to Octal.
Date posted:
October 1, 2019
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The following information was extracted from the books of Dawida businesses enterprise for the year ended 30th June 2000
Determine the additional capital during the year.
Date posted:
October 1, 2019
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The bob in the figure below is deflected then released to oscillate. State and explain one factor that will determine whether the string breaks or not
Date posted:
October 1, 2019
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Convert 0.110112 to its decimal equivalent
Date posted:
October 1, 2019
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A single pendulum consisting of a heavy bob and string is suspended in air as shown in the figure below
Mark on the diagram and name one other force acting on the bob
Date posted:
October 1, 2019
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Convert binary number 11010110.10012 into hexadecimal number.
Date posted:
October 1, 2019