Recent questions without a selected answer

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A girl stands 2m in front of a plane mirror, the mirror is then moved 0.6m away from the girl. Determine the distance from the first position of the image to the second position of the image.

asked Aug 18, 2021 in Physics Form 1 by anonymous

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1 answer

The following is a decay series of Uranium 238.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Using the band theory, differentiate between conductor and a semi-conductor .

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Diagram (a) below shows the position of the bright spot on the screen of a C.R.O when there is no signal on both Y and X- plate. Indicate on the diagram(b) when the Y-plate is connected to a.c signal and for (c) the X- plate is connected to a d.c signal i.e. the display on the screen.

asked Aug 18, 2021 in Physics Form 2 by anonymous

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The grid below shows part of the table. The letter is not the actual chemical symbols of the elements. Study it and use it to answer the question that follows.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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The figure below shows a circuit diagram for a photocell.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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The diagram below shows an electrical appliance connected to the mains.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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1 answer

Differentiate between nuclear fission and nuclear fusion as used in the study of physics.

asked Aug 18, 2021 in Physics Form 4 by anonymous

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Nitrogen gas is used as an inert atmosphere in electric lamps. Explain in terms of structure and bonding why nitrogen gas is so stable .

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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A student used the setup below to prepare oxygen gas in the laboratory. Study it and answer the questions that follow.

asked Aug 18, 2021 in Chemistry Form 1 by anony mous

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The diagram below represents the extraction of sulphur by Frasch process

asked Aug 18, 2021 in Chemistry Form 3 by anony mous

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A stone of mass 4.0kg immersed in water and suspended from a spring balance with a string. The beaker was placed on a compression balance whose reading was 85N. The density of the stone was 3000kg/m-3while the density of the liquid was 800kg/m-3. Determine the;

asked Aug 18, 2021 in Physics Form 4 by anonymous

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1 answer

Dilute hydrochloric acid was added to a compound Z of sodium. The solid reacted with the acid to form a colorless solution H and a colourless gas K which formed a white precipitate when bubbled through lime water. Write the formula of:

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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The diagram below shows a pulley system, a mass of 10kg is raised 2m by an effort of 80N.

asked Aug 18, 2021 in Physics Form 1 by anonymous

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1 answer

State the law of conservation of energy.

asked Aug 18, 2021 in Physics Form 3 by anonymous

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A car tyre is at pressure of 5.0x105 Pa at a temperature of 37℃. While it is running the temperature rises to 75℃. What is the new tyre pressure?(Assume the tyre does not expand)

asked Aug 18, 2021 in Physics Form 3 by anonymous

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2 answers

Draw the structure of a sulphur molecule.

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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1 answer

The figure below shows a set up used to verify pressure law.

asked Aug 18, 2021 in Physics Form 3 by anonymous

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Define the term transition temperature concerning the allotropes of sulphur.

asked Aug 18, 2021 in Chemistry Form 2 by anony mous

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1 answer

Explain how a gas exerts pressure.

asked Aug 18, 2021 in Physics Form 3 by anonymous

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