Answers by anony mous

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A ray of light passing from air to glass is incident at angle of 30°. Calculate the angle of refraction in the glass if the refractive index of glass is 1.50.

answered Jul 26, 2021 in Physics Form 3

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Figure below shows a displacement – time graph per a progressive wave.

answered Jul 26, 2021 in Physics Form 1

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Define the term spring constant K.

answered Jul 26, 2021 in Physics Form 2

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An object is placed 15cm in front of a concave mirror of focal length 10cm.calculate the image distance

answered Jul 26, 2021 in Physics Form 2

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State the number of images formed when an object is between two plane mirrors placed in parallel axis

answered Jul 26, 2021 in Physics Form 1

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State two uses of a charged gold leaf electroscope.

answered Jul 26, 2021 in Physics Form 1

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A body accelerates uniformly from its initial velocity u, to the final velocity, v, in time t. the distance travelled during this is s. If acceleration is donated by letter a, show that;

answered Jul 26, 2021 in Physics Form 3

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One method of producing a weak magnet is to hold a steel rod in the north south direction and hammer it continuously for some time using the domain theory of magnetism. Explain how this method works.

answered Jul 26, 2021 in Physics Form 2

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Give a reason why it is necessary to leave the caps of the cell open when charging on accumulator.

answered Jul 26, 2021 in Physics Form 1

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Define the terms velocity and acceleration.

answered Jul 26, 2021 in Physics Form 3

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The grid below represents part of the periodic table. Study it and answer the questions that follow. The letters are not actual symbols of the elements.

answered Jul 26, 2021 in Chemistry Form 2

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A mass of 3.6g of magnesium reacts in excess chlorine to form a chloride. If the mass of the chloride is 14.25g, find the formula of the chloride formed (Mg=24, Cl=35.5)

answered Jul 26, 2021 in Chemistry Form 3

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Give the name of each of the following properties as described.

answered Jul 26, 2021 in Chemistry Form 4

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Air was passed through several reagents shown in the flow chart below.

answered Jul 26, 2021 in Chemistry Form 1

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An ion T3- has an electronic arrangement of 2.8

answered Jul 26, 2021 in Chemistry Form 1

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Using dots(•) and crosses (x), show the type of bonding in the following compounds

answered Jul 26, 2021 in Chemistry Form 2

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Give two reasons why hydrogen is not commonly used as a fuel.

answered Jul 23, 2021 in Chemistry Form 1

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A mixture of magnesium powder and lead oxide will react vigorously when heated but no reaction occurs when a mixture of magnesium oxide and lead powder are heated.

answered Jul 23, 2021 in Chemistry Form 1

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Lithium has two isotopes with mass numbers 6 and 7. If the relative atomic mass of Lithium is 6.94, determine the percentage abundance of each isotope.

answered Jul 23, 2021 in Chemistry Form 2

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Below is a structure of Aluminium chloride.

answered Jul 23, 2021 in Chemistry Form 2

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