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Calculate the pressure of the gas supply (Atmospheric pressure = 1.0x105Pa)
(Solved)
Calculate the pressure of the gas supply (Atmospheric pressure = 1.0x105Pa)
Date posted:
April 5, 2019
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Answers (1)
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Water of mass 200g at temperature of 60°Cis put in a well lagged copper calorimeter of mass
80g. A piece of ice at 0° C and...
(Solved)
Water of mass 200g at temperature of 60°Cis put in a well lagged copper calorimeter of mass
80g. A piece of ice at 0° C and mass 20g is placed in the calorimeter and the mixture stirred
gently until all the ice melts. The final temperature, T, of the mixture is then measured.
Determine:
i) The heat absorbed by the melting ice at O°C
ii) The heat absorbed by the melted ice (water) to rise to temperature T (answer may be
given in terms of T)
iii) The heat lost by the warm water and the calorimeter (answer may be given in terms of T)
iv) The final temperature of the mixture
Date posted:
April 5, 2019
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Answers (1)
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The figure below shows to light pith balls arranged as shown.
State what is observed when air is blown on the outer sides of the pith...
(Solved)
The figure below shows to light pith balls arranged as shown.
State what is observed when air is blown on the outer sides of the pith balls.
Date posted:
April 5, 2019
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Answers (1)
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A person’s lung pressure as recorded by a mercury manometer is 90 mm Hg. Express this
pressure in SI units.
(Solved)
A person’s lung pressure as recorded by a mercury manometer is 90 mm Hg. Express this
pressure in SI units.
Date posted:
April 5, 2019
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Answers (1)
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The graph below represents a graph of stopping potential Vs , V against frequency f, Hz
(Solved)
The graph below represents a graph of stopping potential Vs , V against frequency f, Hz
Use the graph to determine:
(i) The threshold frequency of the metal
(ii) Plank’s constant
(iii) Work function of the metal
Date posted:
April 5, 2019
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Answers (1)
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State and explain two features of a hydrometer that make it sensitive in its function
(Solved)
State and explain two features of a hydrometer that make it sensitive in its function
Date posted:
April 5, 2019
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Answers (1)
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The figure below shows a balloon carrying hydrogen gas 3m3 of density 0.09kgm-3. The mass
of the balloon fabric is 2kg and the density of air...
(Solved)
The figure below shows a balloon carrying hydrogen gas 3m3 of density 0.09kgm-3. The mass
of the balloon fabric is 2kg and the density of air is 1.25kgm-3
i) Determine the tension in the string
ii) If the string is suddenly cut, calculate the acceleration of the balloon upwards
iii) What is the maximum mass of the equipment the balloon can lift at a constant velocity
Date posted:
April 5, 2019
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Answers (1)
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A measuring cylinder contains 50cm3 of light oil at 0oC. When a lump of dried ice is placed in
the oil, the total volume is 72cm3....
(Solved)
A measuring cylinder contains 50cm3 of light oil at 0oC. When a lump of dried ice is placed in
the oil, the total volume is 72cm3. Determine the density of the ice.
Date posted:
April 5, 2019
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Answers (1)
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A piece of metal N of mass 2kg weighs 18N in water and 12N in liquid M. Determine the density
of ;
(i) The metal N
(ii) The...
(Solved)
A piece of metal N of mass 2kg weighs 18N in water and 12N in liquid M. Determine the density
of ;
(i) The metal N
(ii) The liquid M
Date posted:
April 5, 2019
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Answers (1)
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A bathroom shower has 200 holes each 2.5mm2 in area. Water flows from a pipe of cross-section
area of 15cm2 at 5m/s to the shower. Determine...
(Solved)
A bathroom shower has 200 holes each 2.5mm2 in area. Water flows from a pipe of cross-section
area of 15cm2 at 5m/s to the shower. Determine the speed of the spray.
Date posted:
April 5, 2019
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Answers (1)
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A ship of mass 1300 tonnes floats on sea water:
(i) What volume of sea water is displaced (Density of sea water is 1025kg/m3)
(ii) Suppose it...
(Solved)
A ship of mass 1300 tonnes floats on sea water:
(i) What volume of sea water is displaced (Density of sea water is 1025kg/m3)
(ii) Suppose it sails from sea water to fresh water, what cargo must be removed so that
the same volume of water is displaced? (Density of fresh water = 1000kg/m3
Date posted:
April 5, 2019
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Answers (1)
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The figure below represents a ray of light falling normally on the curved surface of a
semi- circular glass block A at an angle of 32°...
(Solved)
The figure below represents a ray of light falling normally on the curved surface of a
semi- circular glass block A at an angle of 32° at O and emerging into air at an angle of 48°
Calculate the absolute refractive index of the glass of which the block is made.
(Assume air is a vacuum)
Date posted:
April 4, 2019
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Answers (1)
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The refractive index of paraffin is 1.47 and that of glass is 1.55. Determine the critical
angle of a ray of light travelling from glass to...
(Solved)
The refractive index of paraffin is 1.47 and that of glass is 1.55. Determine the critical
angle of a ray of light travelling from glass to paraffin
Date posted:
April 4, 2019
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Answers (1)
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By use of a ray; diagram, show how a concave mirror may be a dentist mirror
(Solved)
By use of a ray; diagram, show how a concave mirror may be a dentist mirror
Date posted:
April 4, 2019
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Answers (1)
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The figure below shows an object placed in front of a plane mirror. Draw appropriate rays to
locate the image as seen by the observer.
(Solved)
The figure below shows an object placed in front of a plane mirror. Draw appropriate rays to
locate the image as seen by the observer.
Date posted:
April 4, 2019
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Answers (1)
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The figure below shows a magnetic material being magnetized
(Solved)
The figure below shows a magnetic material being magnetized
Complete the diagram showing the windings on the magnetic material so as to produce polarities
at A and B both south poles
Date posted:
April 4, 2019
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Answers (1)
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The figure below shows a diagram of a simple electric generator
(Solved)
The figure below shows a diagram of a simple electric generator
i) Label the parts P and Q
ii) Identify the polarities of the poles X and Y
iii) State two ways of increasing the voltage – output in this generator
Date posted:
April 4, 2019
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Answers (1)
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Using a well- labeled diagram explain how a moving coil meter works
(Solved)
Using a well- labeled diagram explain how a moving coil meter works
Date posted:
April 4, 2019
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Answers (1)
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Two pins are attached to each of the magnets as shown below.
(Solved)
Two pins are attached to each of the magnets as shown below.
Explain the behaviour of pins in each case.
Date posted:
April 4, 2019
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Answers (1)
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The figure below shows a micrometer screw gauge being used to measure the diameter of a rod.
The thimble scale has 50 divisions.
(Solved)
The figure below shows a micrometer screw gauge being used to measure the diameter of a rod.
The thimble scale has 50 divisions.
What is the reading?
Date posted:
April 4, 2019
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Answers (1)