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Explain why an air bubble increase in volume as it rises from the bottom of a lake to the surface
(Solved)
Explain why an air bubble increase in volume as it rises from the bottom of a lake to the surface
Date posted:
May 20, 2019
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Answers (1)
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A piece of wire of length 12m is stretched through 2.5cm by a mass of 5 kg. assuming that the wire obeys the Hookes law,...
(Solved)
A piece of wire of length 12m is stretched through 2.5cm by a mass of 5 kg. assuming that the wire obeys the Hookes law, what force will stretch it through 4.0 cm.
Date posted:
May 20, 2019
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Answers (1)
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An object of the mass 150kg moving at 20m/s collides with a stationary object of mass 90kg.They couple after collision .Determine the :
(i) Total momentum...
(Solved)
An object of the mass 150kg moving at 20m/s collides with a stationary object of mass 90kg.They couple after collision .Determine the :
(i) Total momentum before collision
(ii) Total momentum after collision
(iii) Their common velocity after collision
Date posted:
May 20, 2019
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Answers (1)
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State what provides centripetal force for an electron moving round the nucleus.
(Solved)
State what provides centripetal force for an electron moving round the nucleus.
Date posted:
May 20, 2019
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Answers (1)
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The figure below shows a metallic rod of length 10cm and uniform cross-sectional area 4cm2 suspended from spring balance with 7.5 cm of its length...
(Solved)
The figure below shows a metallic rod of length 10cm and uniform cross-sectional area 4cm2 suspended from spring balance with 7.5 cm of its length immersed in water. The density of the material is 1.5g/cm3.The density of water is 1 g/cm3
Determine:
i) The mass of the rod
ii) The upthrust acting on the rod
iii) The reading 0f the spring balance
iv) The reading of the spring balance when the rod is wholly immersed in water
Date posted:
May 20, 2019
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Answers (1)
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The figure below shows velocity-time graphs of two objects A and B drawn on same axes
The two objects are of equal masses. The same size...
(Solved)
The figure below shows velocity-time graphs of two objects A and B drawn on same axes
The two objects are of equal masses. The same size of force is applied against each object. State
with a reason which of the two objects stops in a shorter distance.
Date posted:
May 20, 2019
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Answers (1)
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On the axis provided sketch a graph of mechanical advantage (MA) against load for a pulley
system
(Solved)
On the axis provided sketch a graph of mechanical advantage (MA) against load for a pulley
system
Date posted:
May 20, 2019
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Answers (1)
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Water flows steadily along a horizontal pipe at a volume rate of 8.0×10-3m3/s.If the cross-section area of the pipe is 20cm2. Calculate the velocity of...
(Solved)
Water flows steadily along a horizontal pipe at a volume rate of 8.0×10-3m3/s.If the cross-section area of the pipe is 20cm2. Calculate the velocity of the fluid.
Date posted:
May 20, 2019
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Answers (1)
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Explain how loose clothing may affect safety in the laboratory
(Solved)
Explain how loose clothing may affect safety in the laboratory
Date posted:
May 20, 2019
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Answers (1)
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State two practical applications of stability
(Solved)
State two practical applications of stability
Date posted:
May 20, 2019
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Answers (1)
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The figure below shows a uniform meter rule balanced at the 20 cm mark when a mass of 50g is hanging from its zero cm...
(Solved)
The figure below shows a uniform meter rule balanced at the 20 cm mark when a mass of 50g is hanging from its zero cm mark
Calculate the weight of the rule
Date posted:
May 20, 2019
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Answers (1)
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The figure below shows a section of a solar heater
Explain;
i) Why the pipeline is fixed to a dark coloured collector plate
ii) Why is pipe coloured...
(Solved)
The figure below shows a section of a solar heater
Explain;
i) Why the pipeline is fixed to a dark coloured collector plate
ii) Why is pipe coloured several times
iii) Why is pipe made of copper
iv) Why is the collector plate fixed to an insulator?
v) Why the panel front covered with glass
Date posted:
May 20, 2019
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Answers (1)
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A car weighs 12 000N.
i. What is the force acting on one tyre if the weight is evenly distributed amongst
the tyres?
ii. If the area...
(Solved)
A car weighs 12 000N.
i. What is the force acting on one tyre if the weight is evenly distributed amongst
the tyres?
ii. If the area of contact of tyre is 80cm2.Calculate the pressure of the air in the tyre.
Date posted:
May 20, 2019
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Answers (1)
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You are provided with a test – tube, thread and a meter ruler. Outline the steps you would use to measure the circumference and hence...
(Solved)
You are provided with a test – tube, thread and a meter ruler. Outline the steps you would use to measure the circumference and hence the diameter of the test – tube.
Date posted:
May 20, 2019
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Answers (1)
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The figure below shows a rubber sucker, explain why the sucker sticks on a clean flat
Surface.
(Solved)
The figure below shows a rubber sucker, explain why the sucker sticks on a clean flat
Surface.
Date posted:
May 20, 2019
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Answers (1)
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A micrometer screw gauge has a zero error of -0.03mm. It is used to measure the diameter of a wire. If the actual diameter of...
(Solved)
A micrometer screw gauge has a zero error of -0.03mm. It is used to measure the diameter of a wire. If the actual diameter of the wire is 0.30mm, draw the micrometer screw gauge showing the measured diameter of the wire.
Date posted:
May 20, 2019
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Answers (1)
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Water falls through a height of 60 m at a rate of flow of 1.0x10^5 per minute. Calculate the amount of power generated at the base...
(Solved)
Water falls through a height of 60 m at a rate of flow of 1.0x10^5 per minute. Calculate the amount of power generated at the base of the water fall (the mass of 1 litre of water is 1 kg)
Date posted:
May 19, 2019
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Answers (1)
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An aeroplane is moving horizontally through still air at a uniform
speed. It is observed that when the speed of the plane is increased, its
height above...
(Solved)
An aeroplane is moving horizontally through still air at a uniform
speed. It is observed that when the speed of the plane is increased, its
height above the ground increases. State the reason for this observation.
Date posted:
May 7, 2019
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Answers (1)
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Give the molecular explanation of Charles’ law.
(Solved)
Give the molecular explanation of Charles’ law.
Date posted:
April 24, 2019
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Answers (1)
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Give the molecular explanation of Boyle’s law.
(Solved)
Give the molecular explanation of Boyle’s law.
Date posted:
April 24, 2019
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Answers (1)