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State two uses of radioactivity in medicine.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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An object of height 10 cm is placed 30 cm from a converging lens of focal length 18 cm.

asked Jun 21, 2021 in Physics Form 2 by anonymous

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An object is placed 8cm from a concave mirror whose radius of curvature is 20cm. Determine the position of the image.

asked Jun 21, 2021 in Physics Form 2 by anonymous

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Carbon(II) oxide was passed over 4.1g of heated oxide of copper in a combustion tube until there was no further change. The mass of the final substance was found to be 3.29g

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

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Describe how the focal length of a concave mirror can be determined using a screen and a metre rule.

asked Jun 21, 2021 in Physics Form 2 by anonymous

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A consumer has the following appliances in the house:

asked Jun 21, 2021 in Physics Form 4 by anonymous

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State and explain the factors that are considered when collecting a gas by displacement of

asked Jun 21, 2021 in Chemistry Form 1 by anony mous

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An electric cooker is rated 2.5 kW, 250 V. State the meaning of these values

asked Jun 21, 2021 in Physics Form 4 by anonymous

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State two ways of minimising power losses during the transmission of electric power.

asked Jun 21, 2021 in Physics Form 1 by anonymous

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Figure 4 shows circular water waves incident on a plane reflector placed at an angle to the path of the waves.

asked Jun 21, 2021 in Physics Form 3 by anonymous

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State the purpose of a fuse in an electrical circuit.

asked Jun 21, 2021 in Physics Form 1 by anonymous

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Study the setup in the Figure below and then answer the questions that follow.

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

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Explain how x-rays are produced in the x-ray tube.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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A broadcasting station produces radio waves of wavelength 800 m. Determine their frequency (speed of air is 3 x 108ms-1

asked Jun 21, 2021 in Physics Form 2 by anonymous

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Draw a diagram to show a p-n junction connected in the reverse bias mode.

asked Jun 21, 2021 in Physics Form 4 by anonymous

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Element A has mass number 40 and 21 neutrons

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

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When iron filings are sprinkled onto a bar magnet, it is observed that there are more iron filings at the ends than in the middle. Explain this observation.

asked Jun 21, 2021 in Physics Form 2 by anonymous

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Figure 3 shows an annular ring.

asked Jun 21, 2021 in Physics Form 1 by anonymous

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Figures 2(a) and 2(b) show two circuit diagrams with identical lamps and identical cells

asked Jun 21, 2021 in Physics Form 1 by anonymous

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The critical angle for a ray travelling from glass to air is 42º. Determine the refractive index of the glass

asked Jun 21, 2021 in Physics Form 1 by anonymous

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