The paper rises up because the pressure above becomes less than the pressure below.
Wilfykil answered the question on March 26, 2019 at 08:34
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The figure below shows water forces through a hydraulic system by a pump. An air chamber is used to maintain a continuous flow of water...
(Solved)
The figure below shows water forces through a hydraulic system by a pump. An air chamber is used to maintain a continuous flow of water during both the up-stroke and down-stroke of the piston pump.
Explain how the continuous flow of water is maintained.
Date posted:
March 26, 2019
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Answers (1)
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When spraying a field of water using a hose pipe, it is common to reduce the pipes opening in order to spray water furthest. Other...
(Solved)
When spraying a field of water using a hose pipe, it is common to reduce the pipes opening in order to spray water furthest. Other than pressure, what other quality is varied in the process?
Date posted:
March 26, 2019
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Answers (1)
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Sound is very faint in high altitudes than at sea level. Why?
(Solved)
Sound is very faint in high altitudes than at sea level. Why?
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows air molecules in front of a hollow wooden box P set vibrating by a tuning fork T of frequency 800Hz.
(Solved)
Figure below shows air molecules in front of a hollow wooden box P set vibrating by a tuning fork T of frequency 800Hz.
(a) What is the purpose of fixing the tuning fork on the box which is open on one end?
(b) Name the section labeled X and Y
(c) State and explain the nature of the waves shown
(d) Given that the speed of sound in air is 330ms-1. Calculate the wavelength of the waves.
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows a thick copper plate that is very hot, one side is black and the other is shiny. Two thermometers are placed at...
(Solved)
Figure below shows a thick copper plate that is very hot, one side is black and the other is shiny. Two thermometers are placed at the same distance from each side as shown.
Neglecting heat loss to the surrounding, state with a reason which thermometer records a higher temperature after 10 minutes.
Date posted:
March 26, 2019
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Answers (1)
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When a sound wave travels from a dense to a less dense gas, its velocity changes. What wave property does this observation show?
(Solved)
When a sound wave travels from a dense to a less dense gas, its velocity changes. What wave property does this observation show?
Date posted:
March 26, 2019
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Answers (1)
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Best FM station broadcasts on a frequency of 250 KHz and the wavelength of its signals is 1200m.
(Solved)
Best FM station broadcasts on a frequency of 250 KHz and the wavelength of its signals is 1200m.
Calculate:
(i) The speed of radio waves in m/s
(ii) The wavelength of the signal of another station that broadcasts on a frequency of 200KHZ.
Date posted:
March 26, 2019
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Answers (1)
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State ONE factor that does not change as water moves from shallow to deep part.
(Solved)
State ONE factor that does not change as water moves from shallow to deep part.
Date posted:
March 26, 2019
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Answers (1)
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Figure below shows a displacement – time graph of a wave. The velocity of the wave is 50cm/s.
(Solved)
Figure below shows a displacement – time graph of a wave. The velocity of the wave is 50cm/s.
Determine the:
(i) Amplitude
(ii) Period
(iii) Wavelength
(iv) Frequency
Date posted:
March 26, 2019
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Answers (1)
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State THREE differences between light waves and sound waves.
(Solved)
State THREE differences between light waves and sound waves.
Date posted:
March 26, 2019
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Answers (1)
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A source generates 40 waves in a second. If the wavelength is 8.5 cm. Calculate the time taken to reach a wall 102 m from...
(Solved)
A source generates 40 waves in a second. If the wavelength is 8.5 cm. Calculate the time taken to reach a wall 102 m from the source.
Date posted:
March 26, 2019
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Answers (1)
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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)