T x 40 = 0.4 x 10
T = 0.4 x 10 ÷ 40
= 0.1N
Kavungya answered the question on October 1, 2019 at 09:54
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The figure below shows a bimetallic wheel whose diameter is not affected by changes in temperature. Briefly explain how the diameter of the wheel remain...
(Solved)
The figure below shows a bimetallic wheel whose diameter is not affected by changes in temperature. Briefly explain how the diameter of the wheel remain unchanged as the temperature increases
Date posted:
October 1, 2019
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Answers (1)
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The figure below shows part of a vernier caliper when the jaws are closed without an object between the jaws
(a) What is the value of...
(Solved)
The figure below shows part of a vernier caliper when the jaws are closed without an object between the jaws
(a) What is the value of the zero error of the callipers?
(b) A student used the same vernier calipers in (a) above to measure the diameter of a test tube whose actual diameter is 2.15cm. what was the reading shown by the calipers.
Date posted:
October 1, 2019
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Answers (1)
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To determine the relationship between angular velocity w and tension T, a student used a smooth disc with a hole at the centre, a string...
(Solved)
To determine the relationship between angular velocity w and tension T, a student used a smooth disc with a hole at the centre, a string and cylindrical object of mass m, as shown below
Describe how the student went about determining the relationship, specifying any other necessary material or instrument not shown in the diagram
Date posted:
October 1, 2019
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Answers (1)
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A bicycle wheel with radius 28cm moves with a linear velocity of 8m/s, determine
(Solved)
A bicycle wheel with radius 28cm moves with a linear velocity of 8m/s, determine
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Date posted:
October 1, 2019
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Answers (1)
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In an experiment, 100g of hot water at 90oC was mixed with 20g of ice at 0oC in a lagged plastics colorimeter.
(Solved)
In an experiment, 100g of hot water at 90oC was mixed with 20g of ice at 0oC in a lagged plastics colorimeter. After stirring, all the ice melted and the temperature of the mixture was found to be 61.5oC. Determine the latent heat of fusion of ice
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Date posted:
October 1, 2019
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Answers (1)
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A student set-up the apparatus as shown below to determine the power of an electric heater
(Solved)
A student set-up the apparatus as shown below to determine the power of an electric heater
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(ii) Complete the circuit to show the connection of the essential circuit components
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Date posted:
October 1, 2019
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Answers (1)
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The readings tabulated below shows how the length of a helical spring varied with the load hanging on it
(Solved)
The readings tabulated below shows how the length of a helical spring varied with the load hanging on it
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(iii) Determining form the graph the proportionality constant of the spring
Date posted:
October 1, 2019
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Answers (1)
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The diagram below shows two trolleys, A and B connected to each other by an elastic strip of negligible mass.
(Solved)
The diagram below shows two trolleys, A and B connected to each other by an elastic strip of negligible mass. The trolleys are pulled apart on a smooth plane till tension in the elastic strip is 4.0N and are then released suddenly
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Date posted:
October 1, 2019
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Answers (1)
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A student holds a sheet of paper at an end so that it hangs in the position A as shown below
(Solved)
A student holds a sheet of paper at an end so that it hangs in the position A as shown below
Explain why the paper rises to the position B when the student blows air in the direction shown by the arrow
Date posted:
October 1, 2019
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Answers (1)
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The figure below shows a sheet of material with the shape of an isosceles triangle
(Solved)
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Date posted:
October 1, 2019
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Answers (1)
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A u-tube vertically holds two liquids L1 and L2 as shown in the figure below
(Solved)
A u-tube vertically holds two liquids L1 and L2 as shown in the figure below
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Date posted:
October 1, 2019
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Answers (1)
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The bob in the figure below is deflected then released to oscillate.
(Solved)
The bob in the figure below is deflected then released to oscillate. State and explain one factor that will determine whether the string breaks or not
Date posted:
October 1, 2019
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Answers (1)
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A single pendulum consisting of a heavy bob and string is suspended in air as shown in the figure below
(Solved)
A single pendulum consisting of a heavy bob and string is suspended in air as shown in the figure below
Mark on the diagram and name one other force acting on the bob
Date posted:
October 1, 2019
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Answers (1)
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An object weighs 2.6 N in air and 2.2 N when completely immersed in water. Determine the relative density of the object
(Solved)
An object weighs 2.6 N in air and 2.2 N when completely immersed in water. Determine the relative density of the object
Date posted:
October 1, 2019
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Answers (1)
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Complete the figure below to show how a single pulley can be arranged to a velocity ratio(V.R) of 2
(Solved)
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Date posted:
October 1, 2019
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Answers (1)
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The figure below shows a path taken by a gas molecule moving from point x to z
(Solved)
The figure below shows a path taken by a gas molecule moving from point x to z
(a) Explain how this movement can be observed
(b) State in full, the law of motion that governs movement from x to z
Date posted:
October 1, 2019
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Answers (1)
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The five-tick tape shown below was produced by a ticker timer connected to mains supply of 50Hz when a force pulls the trolley.
(Solved)
The five-tick tape shown below was produced by a ticker timer connected to mains supply of 50Hz when a force pulls the trolley.
Determine the acceleration of the trolley.
Date posted:
September 30, 2019
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Answers (1)
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The machine represented in the diagram can be used to lift water from a well.
(Solved)
The machine represented in the diagram can be used to lift water from a well.
A force of 50N applied on the handle lifts water of weight 180N
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ii) Give a reason why the efficiency is less than 100%.
Date posted:
September 30, 2019
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Answers (1)
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A block of metal of mass 250g at 100°C is dropped into a lagged calorimeter of heat capacity 40J/K containing 100g of water at 25°C....
(Solved)
A block of metal of mass 250g at 100°C is dropped into a lagged calorimeter of heat capacity 40J/K containing 100g of water at 25°C. The temperature of the resulting mixture was found to be 40°C. Determine; (Cw = 4200J/k)
i) Heat gained by calorimeter.
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iii) Heat lost by the block.
iv) Specific heat capacity of the metal block.
Date posted:
September 30, 2019
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Answers (1)
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In an experiment, it was observed that soapy water placed on a wet smooth surface displaced the particles of non-soapy water. Sate and explain this...
(Solved)
In an experiment, it was observed that soapy water placed on a wet smooth surface displaced the particles of non-soapy water. Sate and explain this observation.
Date posted:
September 30, 2019
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Answers (1)