Answers by anony mous

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A student used the measuring instrument below to measure the thickness of a cylindrical wire. If the wire is 10cm long, determine the volume of the wire.

answered Jul 13, 2021 in Physics Form 1

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The diagram below shows a mercury manometer with some dry gas trapped with the other limp open.

answered Jul 13, 2021 in Physics Form 1

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Define centripetal acceleration.

answered Jul 13, 2021 in Physics Form 4

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State one condition necessary for a body to be in equilibrium.

answered Jul 13, 2021 in Physics Form 1

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Sketch a velocity - time graph on the axes provided for

answered Jul 13, 2021 in Physics Form 3

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2.5 kg of water at 20°C is heated in an electric kettle connected to 250V supply. If it took 20 minutes to boil at 100°C specific heat capacity of water is 4200JKg−1 k−1. Determine the power of the kettle element.

answered Jul 13, 2021 in Physics Form 3

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State Newton's second law of motion. (1 mark) A resultant force of 10N acts on a body of mass 0.4kg starting from rest. Find the distance travelled after 10 seconds.

answered Jul 13, 2021 in Physics Form 3

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A pointer attached to a spring balance points to 21.5 cm on a scale when no weight is suspended from it. When a mass of 165g is hanged from it, it points 38.0 cm.

answered Jul 13, 2021 in Physics Form 2

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The above is a simplified diagram of the Downs Cell used for the manufacture of sodium. Study it and answer the questions that follow.

answered Jul 9, 2021 in Chemistry Form 4

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Give the name of the reagent which when reacted with concentrated hydrochloric acid produce chlorine gas.

answered Jul 9, 2021 in Chemistry Form 3

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Study the flow chart below and answer the questions that follow

answered Jul 9, 2021 in Chemistry Form 3

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The scheme below shows several reactions starting with propane. Study the scheme and answer the questions which follow.

answered Jul 9, 2021 in Chemistry Form 4

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Aqueous Copper (II) Sulphate was electrolyzed using the set up represented by the diagram below

answered Jul 9, 2021 in Chemistry Form 4

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In order to determine the molar heat of neutralization of potassium hydroxide, 200cm3 of 1M Hydrochloric acid and 200cm3 Of IM Potassium hydroxide both at the same initial temperature were mixed and stirred continuously with a thermometer. The temperature of the resulting solution was recorded after every 30 seconds until the highest temperature of the solution was attained. Thereafter, the temperature of the solution was recorded for a further two minutes.

answered Jul 8, 2021 in Chemistry Form 4

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Study the data in the table below and answer the questions. The letters do not represent the actual symbols of the elements.

answered Jul 8, 2021 in Chemistry Form 2

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If 25.0cm3 of 0.1 MH2S04 solution neutralized a solution containing 1.06g of sodium carbonate in 250cm3 of solution, calculate,

answered Jul 7, 2021 in Chemistry Form 3

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Study the flow chart below and answer the questions that follow.

answered Jul 7, 2021 in Chemistry Form 3

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3g of 257Lr whose half-life is 8 days, remains after undergoing radioactive decay for 32 days. Find the original amount of substance.

answered Jul 7, 2021 in Chemistry Form 4

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The chief ore of aluminium is bauxite which mainly contains Al2O3.2H20. The ore is initially purified before aluminium is extracted electrolitically.

answered Jul 7, 2021 in Chemistry Form 4

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Study the set up below and answer the questions that follow

answered Jul 7, 2021 in Chemistry Form 1

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