The rate of change of momentum is __________.

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a) Explain briefly the relationship between i) Physics and chemistry ii) Physics and biology iii) Physics and mathematics b i) Give two (2) examples of items in chemistry that use the application of physics ii) Give two (2) concepts in Mathematics that is relevant to the study of physics

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(c) Mention two (2) areas where geothermal energy can be harnessed.

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Briefly explain the following situations

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a) Define the following terms i) Thermometer ii) Constriction b) Name three (3) types of thermometer c) State three (3) reasons why mercury is preferred for use as a thermometric liquid.

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a) Define the following terms i) Efficiency. ii) Fulcrum b) List down three (3) most common types of simple machine. c) A handle of the screw – jark is 40cm long and the pitch of the screw is 0.5cm. what force must be applied to the end of the handle when lifting a load of 2400N if the efficiency of the jark is 40%.

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A truck for transporting sand is filled to its capacity. If the digger had to move through a height of 2 metres and the total load was 5000kg. Calculate: i) The work done in loading the sand. ii) The power developed in 5 seconds,

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