When wind blow across them, it reduces the pressure of the air outside compared to the pressure of air inside causing the building.
sharon kalunda answered the question on September 26, 2019 at 07:57
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Three identical spring balances of spring constant 40N/M and weight 0.5N are used to support a load as shown. Determine the total extension of the...
(Solved)
Three identical spring balances of spring constant 40N/M and weight 0.5N are used to support a load as shown. Determine the total extension of the system.
Date posted:
September 26, 2019
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Answers (1)
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A drop of oil has a volume of 3.0 x 10-6m3 and spreads to form a patch of radius 16cm on the surface of water. Determine the...
(Solved)
A drop of oil has a volume of 3.0 x 10-6m3 and spreads to form a patch of radius 16cm on the surface of water. Determine the thickness of the oil patch.
Date posted:
September 26, 2019
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Answers (1)
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The figure below shows a homogenious wooden sphere with a nail driven or hammered into it at a point x as shown below.
(Solved)
The figure below shows a homogenious wooden sphere with a nail driven or hammered into it at a point x as shown below.
The sphere is allowed to roll after a little push on it. On what position will it settle along the plane PQ.Give a reason for your answer.
Date posted:
September 26, 2019
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Answers (1)
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Explain why a dead dog thrown next to school smells so much during the day than during cold morning.
(Solved)
Explain why a dead dog thrown next to school smells so much during the day than during cold morning.
Date posted:
September 26, 2019
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Answers (1)
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The diagram below show a battery of e.m.f 12V and an internal resistance of 0.17O connected to a combination of resistors.
(Solved)
The diagram below show a battery of e.m.f 12V and an internal resistance of 0.17Ω connected to a combination of resistors.
Calculate
i). The current through the 3.0Ω resistor.
ii). The potential difference across the parallel connection.
iii). The current through the 4Ω resistor.
Date posted:
September 26, 2019
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Answers (1)
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A 10µF capacitor is charged by a 100 V supply and then connected a cross an uncharged 20µF capacitor. Calculate the final p.d on each...
(Solved)
A 10μF capacitor is charged by a 100 V supply and then connected a cross an uncharged 20μF capacitor. Calculate the final p.d on each capacitor.
Date posted:
September 26, 2019
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Answers (1)
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Two similar razor blades are placed one on a wooden block and the other on a soft iron block as shown in the figure below
(Solved)
Two similar razor blades are placed one on a wooden block and the other on a soft iron block as shown in the figure below
It was observed that the razor blade on the wooden block was attracted to the magnet while the other on the soft iron block was not. Explain.
Date posted:
September 26, 2019
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Answers (1)
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A radio signal of 30MHz is received by an aerial whose length is 0.125 of its wavelength. If the speed of light is 3.0x108 m/s...
(Solved)
A radio signal of 30MHz is received by an aerial whose length is 0.125 of its wavelength. If the speed of light is 3.0x108 m/s determine the length of the aerial.
Date posted:
September 26, 2019
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Answers (1)
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The figure below shows a thin wire connected to a charge generator and placed close to a candle flame.
(Solved)
The figure below shows a thin wire connected to a charge generator and placed close to a candle flame.
Explain why the candle flame is deflected as shown.
Date posted:
September 26, 2019
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Answers (1)
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Explain why it is dangerous for a bus to carry standing passengers.
(Solved)
Explain why it is dangerous for a bus to carry standing passengers.
Date posted:
September 26, 2019
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Answers (1)
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The diagram below shows a wire loop with two threads tied across it. The loop is dipped into a soap solution such that the soap...
(Solved)
The diagram below shows a wire loop with two threads tied across it. The loop is dipped into a soap solution such that the soap film covers it as shown.
Region B is punctured such that the soap film in that section is broken. On the space alongside the diagram sketch the resulting shape of the wire loop. Give a reason for the shape.
Date posted:
September 26, 2019
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Answers (1)
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In an experiment to determine the density of sand using a density bottle, the following measurements were recorded:
(Solved)
In an experiment to determine the density of sand using a density bottle, the following measurements were recorded:
Mass of empty density bottle = 43.2g
Mass of density bottle full of water = 66.4g
Mass of density bottle with some sand = 67.5g
Mass of density bottle with the sand filled up with water = 82.3g
Use the above data to determine the;
a) Mass of the water that completely filled the bottle.
b) Volume of water that completely filled with the bottle.
c) Volume of the density bottle;
d) Mass of sand
e) Mass of water that filled the space above the sand.
f) Volume of the sand
g) Density of the sand
Date posted:
September 12, 2019
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Answers (1)
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The distance between an upright image and the object produced by a thin lens is 40cm. The image is 3 times as tall as the...
(Solved)
The distance between an upright image and the object produced by a thin lens is 40cm. The image is 3 times as tall as the object.
i) State the type of lens used.
ii) Determine the object distance.
iii) Determine the radius of curvature.
iv) State one application of the lens as used in question (b) above.
Date posted:
September 12, 2019
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Answers (1)
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The figure below shows a rectangular object of mass 100kg tethered to the sea-bed by a wire. The dimension are 4m ×1.5m × 2m
(Solved)
The figure below shows a rectangular object of mass 100kg tethered to the sea-bed by a wire. The dimension are 4m ×1.5m × 2m
Calculate the:
i) Weight of sea water displaced by the buoy (density of sea water = 1100kgm-3)
ii) Upward force exerted on the buoy by the water.
iii) The tension on the string.
Date posted:
September 12, 2019
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Answers (1)
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The figure below shows a bimetallic strip in electric circuit made of two metals A and B. B expands more than A.
(Solved)
The figure below shows a bimetallic strip in electric circuit made of two metals A and B. B expands more than A.
X and Y are metal contact while P and Q are identical bulbs. Explain the effect on the bulb when ice cold water is poured onto the strip.
Date posted:
September 12, 2019
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Answers (1)
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Three identical springs each of spring constant 10N/m and weight 0.5N are used to support a load as shown.
(Solved)
Three identical springs each of spring constant 10N/m and weight 0.5N are used to support a load as shown.
Determine the total extension of the system.
Date posted:
September 12, 2019
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Answers (1)
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Give a reason why lecture theatre halls are covered with soft perforated materials.
(Solved)
Give a reason why lecture theatre halls are covered with soft perforated materials.
Date posted:
September 12, 2019
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Answers (1)
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A car of mass 800kg starts and accelerates at 1.2ms-2. Determine its momentum after it has moved 400m from the starting point.
(Solved)
A car of mass 800kg starts and accelerates at 1.2ms-2. Determine its momentum after it has moved 400m from the starting point.
Date posted:
September 12, 2019
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Answers (1)
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Explain the energy change that occur when a man climbs the mountain.
(Solved)
Explain the energy change that occur when a man climbs the mountain.
Date posted:
September 12, 2019
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Answers (1)
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Calculate the impulse of force produced when a table is pulled for 3 seconds by a constant force of 10N towards the right and then...
(Solved)
Calculate the impulse of force produced when a table is pulled for 3 seconds by a constant force of 10N towards the right and then for 2 seconds by a constant force of 20N towards the left.
Date posted:
September 12, 2019
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Answers (1)