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0
votes
The diagram below shows the behaviour of mercury in a capillary tube. Explain this observation
answered
Aug 6, 2021
in
Physics Form 1
pressure
0
votes
A body weighs 600N on the surface of the earth and 450N on the surface of another planet. Calculate the value of g in that planet (g on the earth = 10 N/Kg)
answered
Aug 6, 2021
in
Physics Form 1
force
0
votes
A small drop of oil has a volume of 5 x 10-8m3. When it is put on a surface of some clean water, it forms a circular film of 0.1m2 in area.
answered
Aug 6, 2021
in
Physics Form 1
measurements
0
votes
The figure below shows the change in volume of water in a measuring cylinder when an irregular solid is immersed in it.
answered
Aug 6, 2021
in
Physics Form 1
measurements
0
votes
Draw a vernier caliper scale to show a reading of 3.36cm
answered
Aug 6, 2021
in
Physics Form 1
measurements
0
votes
A Magnesium ribbon was cleaned with steel wool and used in the following set up. Wet sand was heated before Magnesium ribbon.
answered
Aug 6, 2021
in
Chemistry Form 1
water and hydrogen
0
votes
Hydrated Copper (II) Sulphate is heated in a boiling tube as shown.
answered
Aug 6, 2021
in
Chemistry Form 1
classification of substances
0
votes
Balance the following chemical equations
answered
Aug 6, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
Define the following terms as used in medicine: Drug
answered
Aug 6, 2021
in
Chemistry Form 1
simple classification of substances
0
votes
Under what conditions does the Bunsen burner produce the luminous flame?
answered
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
A non-luminous flame is preferred for heating. Explain
answered
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
The following diagram represents a non-luminous flame of the Bunsen burner
answered
Aug 5, 2021
in
Chemistry Form 1
air and combustion
0
votes
Two elements M and N have atomic numbers 17 and 20 respectively. Write the formula of the compound formed when M and N react.
answered
Aug 5, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
The table below shows the atomic numbers of four elements W,X,Y and Z
answered
Aug 5, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
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.
answered
Aug 5, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
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
answered
Aug 5, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
An element, A, has 30 protons and 35 neutrons. What is
answered
Aug 5, 2021
in
Chemistry Form 2
structure of the atom and the periodic table
0
votes
Element X has two isotopes. Two thirds of 3316X and one-third 3016X. What is the relative mass of element X?
answered
Aug 5, 2021
in
Chemistry Form 1
structure of the atom and the periodic table
0
votes
Give an industrial application of sublimation
answered
Aug 5, 2021
in
Chemistry Form 1
classification of substances
0
votes
Name two other substances that behave as dry ice
answered
Aug 5, 2021
in
Chemistry Form 2
carbon and its compounds
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