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The following results were recorded in an experiment where different masses were hung on the end of a long spring whose other end was firmly fixed. The length of the spring and the mass hanging from it were recorded as below. Original length of spring was 40cm.
(a) Complete the table for load and corresponding extensions
(b) Plot a graph of extension of the spring against load on the spring on the grid provided
(c) Determine the spring constant using the linear section of the graph
(d) Give an explanation why the slope of the graph changes when a mass greater than 0.75kg is attached to the spring
(e) From the list of quantities below, select quantities that are vector quantities:-
speed, density, force, acceleration and current
Date posted:
April 4, 2019
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In the diagram in figure, water flows through a section of a pipe whose diameter changes as shown
Sketch a graph of the variation of pressure along the line ABCD.
Date posted:
April 4, 2019
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The diagram below shows a section of a pipe with different cross – sectional area.
If water flows with a velocity of 5m/s in section P, what would be the velocity of water in section Q if the cross sectional areas are as shown?
Date posted:
April 4, 2019
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A uniform metre rule is balanced at its centre. It is balanced by the 30N, 5N and the magnetic
force between P and Q. P is fixed and Q has a weight of 5N
Ignoring the weight of the metre rule, calculate the value of the magnetic force between Q and P
Date posted:
April 3, 2019
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A uniform half metre long beam, pivoted at the 10cm mark, balances when a mass of 150g is suspended at the 0cm mark as shown below:
Calculate the weight of the beam
Date posted:
April 3, 2019
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Figure below shows a uniform rod AE which is 40cm long. It has a mass of 2kg and pivoted at D. If 2N is acting at point E, and 30N force is passed through a frictionless pulley.
Find the force (x) acting at end A.
Date posted:
April 3, 2019
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Figure shows a uniform wooden plank which weighs 10N. The plank is balanced at 0.8m from one end by a mass of 2.5kg.
What is the length of the wooden plank in metres?
Date posted:
April 3, 2019
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The diagram below shows a uniform meter rule of mass 300g balanced by two forces F1 and F2.Force F2 is 5N. Assuming there is no frictional force on the pulleys,
Calculate the force F1
Date posted:
April 3, 2019
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Figure below shows a uniform metre rule in equilibrium under the forces shown.
Determine the weight of the metre rule
Date posted:
April 3, 2019
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Draw a sketch of a micrometer screw gauge showing a reading of 8.53mm.
Date posted:
April 3, 2019
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Give the reading on the micrometer screw gauge if it has a positive zero error of 0.01mm.
Date posted:
April 3, 2019
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Three identical springs A, B and C of negligible weight are arranged as shown below;
If C stretches by 3cm, and bar XY is assumed to be weightless, determine the extension in A
Date posted:
April 3, 2019
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Figure shows marble of mass 2.0g placed between the jaws of Vernier calipers. The magnified section is also shown. The reading of the gauge when the jaws were fully closed without the marble was 0.01cm. Use this information and the figure to answer questions a and b.
a)What is the diameter of the marble?
b)Determine the density of the marble give your answer to three significant figure (assume that the
marble is spherical)
Date posted:
April 3, 2019
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A micrometer screw gauge has a negative zero error of 0.06mm. Show on a micrometer screw gauge, including the essential parts only a reading of 5.99mm
Date posted:
April 3, 2019
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The vernier calipers shown below have a zero error of -0.06 cm
State the actual reading on the instrument.
Date posted:
April 3, 2019
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(a)The data below was obtained in an experiment to estimate the diameter of an oil molecule:-
- Level of oil in burette= 26cm3
- Level of oil in burettes after adding 50drops of oil=25.2cm3
- Diameter of oil patch= 7cm
(i) Determine the volume of one drop of oil
(ii) Calculate the thickness of a molecule
(iii) State any two assumptions made in this experiment
(iv) In the experiment 14.(a) lycopodium powder is used on the water surface. What is the role
of the lycopodium powder?
(b) A molecule of a liquid occupies a space about 1.5 x 10-9-9m in
thickness and breadth. Calculate the number of molecules in a litre of the liquid
Date posted:
April 3, 2019
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Lycopodium powder is lightly sprinkled on a clean water surface in a large tray. A red hot needle is plunged at the centre of the water surface. State and explain the observation
Date posted:
April 3, 2019
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Water in a dam falls through a height 24.5m. If we assume that there are no energy losses,calculate the new temperature of the water as it strikes the lower end, given that its initial temperature at the top of the dam is 18.9°C.Take specific heat capacity of water = 4200J/kg
Date posted:
April 3, 2019
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The springs A, B, C and D are identical and each extends by 2cm, when a force of 6N is suspended on the system. Determine the extension of the system
Date posted:
April 3, 2019
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The figure below represents a bimetallic strip of metals X and Y at room temperature.
The figure below shows its shape when dipped into crushed ice
Sketch a diagram in the space given below to show the shape when the strip is heated to a
temperature above the room temperature
Date posted:
April 3, 2019
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The figure below shows a bimetallic strip made of brass and iron. A marble is placed at end A of the bimetallic strip as shown below:-
State and explain what will be observed when the bimetallic strip is strongly cooled.
Date posted:
April 3, 2019
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What do you understand by the statement ‘lower fixed point’ on a temperature scale?
Date posted:
April 3, 2019
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State two liquids which are used in thermometer.
Date posted:
April 3, 2019
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Figure shows a beam balance made out of concrete and reinforced with steel.
Use a diagram to explain the behaviour of the shape of the beam when heated up.
Date posted:
April 3, 2019
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An oil drop of average diameter 0.7mm spreads out into a circular patch of diameter 75cm on the surface of water in a trough
(i) Calculate the average thickness of a molecule of oil
(ii) State two assumptions made in (i) above
Date posted:
April 3, 2019
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The diagram figure below shows a glass tube containing enclosed air by a thread of mercury 50mm
long when the tube is held in a horizontal position.
(i) The tube is slowly raised in a vertical position with the open end facing up. Determine
the new length of the trapped air (tube has same area of cross-section; atmospheric pressure = 750mmHg)
(ii) Account for the difference in the column of trapped air using kinetic theory of matter assuming that temperature is constant.
Date posted:
April 3, 2019
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A partially filled balloon is placed in a bell jar with its open end on a thick glass plate
as shown in figure. The contact between the jar and the glass plate is greased to make it air tight:
State and explain what happens to the balloon when air in the ball jar is slowly evacuated.
Date posted:
April 2, 2019
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You are provided with a long glass-tube, fitting corks, cotton wool, concentrated solution hydrochloric acid and concentrated ammonia solution.
(i) Draw a possible set-up to compare the rates of diffusion of ammonia gas and hydrochloric acid gas
(ii) Outline a clear procedure on how the experiment can be carried out.
(iii) What are the possible observations and conclusion
Date posted:
April 2, 2019
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Draw the cross-section of a basic solar heating panel that uses heat from the sun to warm
water which flows through pipes
Date posted:
April 2, 2019
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Distinguish between natural and forced convection currents.
Date posted:
April 2, 2019