– Lower the temperature
- Remove impurities.
Kavungya answered the question on October 1, 2019 at 10:42
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Explain the washing effect of soap.
Date posted: October 1, 2019. Answers (1)
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A bullet of mass 10g travelling at a speed of 400ms-1 hits a tree trunk, it penetrates the tree trunk and stops inside the trunk after 4 cm.
(a) Calculate the average resistance force offered by the trunk to the bullet.
(b) State the energy changes that takes place.
Date posted: October 1, 2019. Answers (1)
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Explain why a hole in a ship near the bottom is more dangerous than the one near the top
Date posted: October 1, 2019. Answers (1)
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Explain this observation(Solved)
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Date posted: October 1, 2019. Answers (1)
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A uniform metre rule of mass 40g is pivoted at the 60cm mark and held horizontally with a vertical string as shown below. Determine the tension in the string.
Date posted: October 1, 2019. Answers (1)
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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 unchanged as the temperature increases
Date posted: October 1, 2019. Answers (1)
- 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. 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 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. Answers (1)
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A bicycle wheel with radius 28cm moves with a linear velocity of 8m/s, determine
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Date posted: October 1, 2019. 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. 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. Answers (1)
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(i) Other than time, state the measurements that would be used to determine the quantity of heat P absorbed by ice in a unit time
(ii) Complete the circuit to show the connection of the essential circuit components
(iii) Describe how the student would proceed to determine P
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Date posted: October 1, 2019. Answers (1)
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(i) Complete the table to show the values of extension
(ii) Draw a graph of extension (y-axis) against load for the spring
(iii) Determining form the graph the proportionality constant of the spring
Date posted: October 1, 2019. Answers (1)
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(a) State with reason the total momentum of the trolleys when they are just released
(b) Calculate the initial acceleration of trolley A when released
(c) The velocity of the trolley B is 0.9ms-1 just before it collides with A. Determine the velocity of A just before the collision
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Date posted: October 1, 2019. Answers (1)
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Date posted: October 1, 2019. Answers (1)
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Date posted: October 1, 2019. Answers (1)
- 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. Answers (1)
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Date posted: October 1, 2019. Answers (1)
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Date posted: October 1, 2019. Answers (1)
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Date posted: October 1, 2019. Answers (1)
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Date posted: October 1, 2019. Answers (1)