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Study the information in the table and answer the questions that follow. The elements belong to the same chemical family. (The letters are not actual symbols of the elements)

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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A metallic box weighs 188N and measures 10cm by 30 cm by 8 cm. Determine the maximum pressure it can exert when lying on one of its surfaces.

asked Jun 21, 2021 in Physics Form 1 by anonymous

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Excess dilute hydrochloric acid was added to an alloy of copper and zinc in a beaker.

asked Jun 21, 2021 in Chemistry Form 4 by anony mous

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When chlorine is bubbled through hot concentrated sodium hydroxide solution, sodium chlorate(V), sodium chloride and water are formed.

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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A step down transformer has 600 turns in the primary coil. The input voltage is 120 V while the output voltage is 24 V. Determine the number of turns in the secondary coil.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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State how eddy currents are minimised in a transformer.

asked Jun 21, 2021 in Physics Form 1 by anonymous

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The Figure below shows a reaction scheme starting with copper turnings. Study it and answer the questions that follow

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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Figure 8 shows two straight conductors P and Q connected to a battery and a variable resistor.

asked Jun 21, 2021 in Physics Form 1 by anonymous

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Figure 7 shows a soft iron ring placed between the poles of two bar magnets.

asked Jun 21, 2021 in Physics Form 2 by anonymous

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State the difference between a covalent bond and a dative covalent bond.

asked Jun 21, 2021 in Chemistry Form 2 by anony mous

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Figure 6 shows a graph of stopping potential against the frequency for a certain photo emissive surface, drawn by a student from the data collected when carrying out an experiment on photoelectric effect.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Draw a labelled diagram of the setup of apparatus that can be used to electrolyse lead (ll) bromide.

asked Jun 21, 2021 in Chemistry Form 4 by anony mous

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State one difference between the deflection systems of a cathode ray tube and the television tube.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Name the three components of the electron gun in a cathode ray tube.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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The table shows pH values of solutions of compounds D, E. F and G

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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The half life of a certain radioactive substance is 24 days. Given that the initial sample of the substance has a mass of 64 g, determine the mass which is left after 72 days.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Arrange the following electromagnetic waves in the order of decreasing frequency: Microwaves; Gamma rays; Radiowaves; X-rays.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Figure 5 shows a radioactive element placed in an evacuated glass chamber. The element produces alpha, beta and gamma emissions.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Draw the structural formula of 2-methylbut-2-ene.

asked Jun 21, 2021 in Chemistry Form 3 by anony mous

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The following is a nuclear reaction equation: 63Li+10n →31H +xyP Determine the values of x and y.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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