Recent questions without a selected answer

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1 answer

A non-luminous flame is preferred for heating. Explain

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

The following diagram represents a non-luminous flame of the Bunsen burner

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

The following figure shows a transverse wave travelling along the x-axis.

asked Aug 5, 2021 in Physics Form 2 by anony mous

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1 answer

Two elements M and N have atomic numbers 17 and 20 respectively. Write the formula of the compound formed when M and N react.

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

The table below shows the atomic numbers of four elements W,X,Y and Z

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

A car of mass 2000kg travelling at 5ms−1 collides with a minibus of mass 5000kg travelling in the opposite direction at 7ms−1. The vehicles stick and move together after collision. If the collision lasts for 0.1seconds;

asked Aug 5, 2021 in Physics Form 3 by anony mous

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2 answers

Elements X and Y have atomic numbers 11 and 17 respectively. Which one of the elements is a metal? Give a reason for your answer.

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

An element B consists of three isotopes of mass, 28, 29 and 30 and percentage abundances of 92.2, 4.7 and 3.1 respectively. Show that the relative atomic mass of element is 28.11

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

A ball rolls off a platform of height 1.8m at a horizontal speed of 15 ms−1. How far off the edge of the platform does it land?

asked Aug 5, 2021 in Physics Form 3 by anony mous

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1 answer

An element, A, has 30 protons and 35 neutrons. What is

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

Element X has two isotopes. Two thirds of 3316X and one-third 3016X. What is the relative mass of element X?

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

The following figure shows velocity –time graph for the journey of a car in 100minutes.

asked Aug 5, 2021 in Physics Form 3 by anony mous

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1 answer

Give an industrial application of sublimation

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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3 answers

Name two other substances that behave as dry ice

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

A force of 2.0N compresses a spring by 1.0mm. Determine the energy stored in the spring

asked Aug 5, 2021 in Physics Form 2 by anony mous

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1 answer

Carbon (IV) sublimes at -78ºC. It is called dry ice

asked Aug 5, 2021 in Chemistry Form 2 by anonymous

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1 answer

State two situations where redox reactions are applied in industry

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

A stone is tied to a string and whirled in a horizontal circle at a constant speed. In which direction is the stone being accelerated at each point of its path?

asked Aug 5, 2021 in Physics Form 4 by anony mous

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1 answer

Observe the equation below

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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1 answer

State two similarities between rusting and combustion

asked Aug 5, 2021 in Chemistry Form 1 by anonymous

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