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State one effect that would be observed when water waves pass from deep to shallow water.
(Solved)
State one effect that would be observed when water waves pass from deep to shallow water.
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows the displacement – time graph for a certain wave
(Solved)
Figure below shows the displacement – time graph for a certain wave
Determine the frequency of the wave?
Date posted:
March 26, 2019
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Answers (1)
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Two identical springs of spring constant 3N/cm are used to support a load of 30N as shown. Determine the extension of each spring.
(Solved)
Two identical springs of spring constant 3N/cm are used to support a load of 30N as shown. Determine the extension of each spring.
Date posted:
March 26, 2019
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Answers (1)
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An experiment was performed to find out how the length L of a spiral spring varies with the compression force, F. The figure below shows...
(Solved)
An experiment was performed to find out how the length L of a spiral spring varies with the compression force, F. The figure below shows the variation.
(i) Draw a diagram of a possible set up of the apparatus
(ii) Over which range of the force does the spring obey Hooker’s law?
(iii) Suggest a reason for the shape of the graph between 40N and 60N
Date posted:
March 26, 2019
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Answers (1)
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State FOUR reasons why the efficiency of an electric motor is always less than 100%
(Solved)
State FOUR reasons why the efficiency of an electric motor is always less than 100%
Date posted:
March 26, 2019
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Answers (1)
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An un-insulated copper wire XY lies over the fixed wire A and B connected to a battery when the key in the circuit is closed,...
(Solved)
An un-insulated copper wire XY lies over the fixed wire A and B connected to a battery when the key in the circuit is closed, the wire XY experiences a force.
(i) In which direction does the wire XY- experience the force?
(ii) How do you determine the direction in (i) above
(iii) When is the force on the wire XY greatest?
(iv) What is the effect of reversing both the magnetic field and direction of flow of current?
(v) State TWO factors by which the force on XY can be decreased
Date posted:
March 26, 2019
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Answers (1)
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State the modification introduced in the modern buses so as to enhance stability
(Solved)
State the modification introduced in the modern buses so as to enhance stability
Date posted:
March 25, 2019
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Answers (1)
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State two factors that determine the stability of a vehicle
(Solved)
State two factors that determine the stability of a vehicle
Date posted:
March 25, 2019
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Answers (1)
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Why are people who are maimed or have lost one leg provided with crutches?
(Solved)
Why are people who are maimed or have lost one leg provided with crutches?
Date posted:
March 25, 2019
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Answers (1)
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Why is it very difficult to open a door from a point too close to hinges?
(Solved)
Why is it very difficult to open a door from a point too close to hinges?
Date posted:
March 25, 2019
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Answers (1)
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Sketch a diagram of a simple cell.
(Solved)
Sketch a diagram of a simple cell.
Date posted:
March 25, 2019
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Answers (1)
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The figure shows a device for closing a steam outlet
Determine the weight W that just holds the bar in the horizontal position shown.
(Solved)
The figure shows a device for closing a steam outlet
The area of the piston is 4.0 x 10-4 m2 and the pressure of the steam in the boiler
is 2.0 x 105Nm-2. Determine the weight W that just holds the bar in the horizontal
position shown.
Date posted:
March 25, 2019
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Answers (1)
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In an experiment, the diameter, of the patch was measured to be 200mm for an oil drop of radius 0.25mm. Determine the diameter of the...
(Solved)
In an experiment, the diameter, of the patch was measured to be 200mm for an oil drop of radius 0.25mm. Determine the diameter of the molecule of the oil.
Date posted:
March 25, 2019
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Answers (1)
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Two pins are hanging from a magnet as shown in the diagram below.
(Solved)
Two pins are hanging from a magnet as shown in the diagram below.
Explain why they do not hang vertically downwards.
Date posted:
March 25, 2019
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Answers (1)
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The figure below shows a ray of light incident to the first of the two mirrors placed at an angle of 60°.
(Solved)
The figure below shows a ray of light incident to the first of the two mirrors placed at an angle of 60°.
Complete the part of the ray after reflection from the mirrors.
Date posted:
March 25, 2019
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Answers (1)
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A gas of volume 2m³ at 27°C is cooled to -123°C, at constant pressure. What is its new volume?
(Solved)
A gas of volume 2m³ at 27°C is cooled to -123°C, at constant pressure. What is its new volume?
Date posted:
March 25, 2019
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Answers (1)
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A block of length 80cm, cross sectional area 3.0cm² and density 1300kg/m³ is completely immersed in a liquid of density 1030kg/m³. Determine
i) The mass of...
(Solved)
A block of length 80cm, cross sectional area 3.0cm² and density 1300kg/m³ is completely immersed in a liquid of density 1030kg/m³. Determine
i) The mass of the block.
ii) The weight of the block in the liquid.
Date posted:
March 25, 2019
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Answers (1)
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A stone of mass 1.2 kg is tied to a rope and whirled in a vertical circle of radius 3.2m with a speed of 6.32m/s....
(Solved)
A stone of mass 1.2 kg is tied to a rope and whirled in a vertical circle of radius 3.2m with a speed of 6.32m/s. Calculate
i) The centripetal acceleration of the stone.
ii) The tension in the rope when the stone is at the highest point.
Date posted:
March 25, 2019
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Answers (1)
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The figure below shows the motion of a ticker tape through a ticker-timer whose frequency is 100Hz.
(Solved)
The figure below shows the motion of a ticker tape through a ticker-timer whose frequency is 100Hz.
Determine:
I. Velocity at AB and PQ
II. Acceleration of the tape.
Date posted:
March 25, 2019
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Answers (1)
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In areas of the world where a plane is unable to land free fall airdrops can be used to deliver supplies. A plane travelling at...
(Solved)
In areas of the world where a plane is unable to land free fall airdrops can be used to deliver supplies. A plane
i) Sketch the path followed by the falling load.
ii) Find the horizontal distance of the load from the drop zone to where it landed.travelling at a speed of 90m/s and a height of 100m releases a load of supplies.
Date posted:
March 25, 2019
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Answers (1)