Temperature increase causes increase in kinetic energy of the particles hence the rate of diffusion increases.
Githiari answered the question on September 16, 2017 at 07:19
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Explain how oiling still water controls the breeding of mosquitoes
Date posted: September 16, 2017. Answers (1)
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If the ball is spinning in the anticlockwise direction, the ball is seen to move upwards from its initial path. Explain
Date posted: September 16, 2017. Answers (1)
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(Solved)
Distinguish between solid and liquid using molecular motion
Date posted: September 16, 2017. Answers (1)
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Explain how the braking system of a car works.
Date posted: September 15, 2017. Answers (1)
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A magnetized bar is passed over a bunsen flame several times. When tested it is found to be demagnetized. Explain this observation.
Date posted: September 15, 2017. Answers (1)
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An uncharged metal rod is brought close but not touching the cap of a charged electroscope causes a decrease in the divergence of the leaf. Explain.
Date posted: September 15, 2017. Answers (1)
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Give a reason why an air bubble increases in volume as it ascends to the surface of the liquid in a boiler.
Date posted: September 15, 2017. Answers (1)
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Why are the caps of the cell of a lead acid accumulator opened when charging the battery?
Date posted: September 12, 2017. Answers (1)
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Why do bus body builders build luggage compartments under the seats rather than on roof rack?
Date posted: September 9, 2017. Answers (1)
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I bought some red pens at sh 6 each and some blue pens at sh 4 each. If I bought 38 pens in total and paid sh 192 for them, find the number of red and blue pens I bought.
Date posted: June 8, 2017. Answers (1)
- Figure 8 shows a uniform light bar resting horizontally on corks floating on water in two beakers A and B. (Solved)
Figure 8 shows a uniform light bar resting horizontally on corks floating on water in two beakers A and B.
Explain why the bar tilts towards side A when equal amount of heat is supplied to each beaker.
Date posted: June 7, 2017. Answers (1)
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The light uniform bar in Figure 3 is in equilibrium. The two beakers A and B contain water at the same temperature. The two blocks are made of the same material.
If the temperature of the water in beaker A is now raised, explain why the beam tips to side A. Assume the solid does not expand.
Date posted: June 7, 2017. Answers (1)
- Figure 11 shows a depletion layer in an unbiased p-n junction. (Solved)
Figure 11 shows a depletion layer in an unbiased p-n junction.
State how a battery can be used to make the depletion layer narrower.
Date posted: June 7, 2017. Answers (1)
- Figure 12 shows a depletion layer in an unbiased p-n junction. (Solved)
Figure 12 shows a depletion layer in an unbiased p-n junction.
State how a battery can be used to make the depletion layer narrower.
Date posted: June 7, 2017. Answers (1)
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Figure 6 (a) and Figure 6 (b) show a p-n junction connected to a battery. It is observed that the current in figure (6) (a) is greater than the current in figure 6 (b).
State the reason for this observation.
Date posted: June 7, 2017. Answers (1)
- Figure 5 shows the circuit of a rectifier using four diodes D1, D2, D3 and D4. (Solved)
Figure 5 shows the circuit of a rectifier using four diodes D1, D2, D3 and D4.
Explain how a rectified output is produced from the set up when an a.c input is connected across AB.
Date posted: June 6, 2017. Answers (1)
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In the circuit in fig. 5, when the switch S is closed, the voltmeter shows a reading.
When the cell terminals are reversed and the switch is closed, the voltmeter reading is zero. Explain these observations.
Date posted: June 6, 2017. Answers (1)
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The following is part of a radioctive decay series.
Determine the values of a and b.
Date posted: June 6, 2017. Answers (1)
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Radium undergoes radioctive decay by emitting an alpha particle to form a daughter nuclide Q as in the reaction:
Determine the values of:
(a) x (b) y
Date posted: June 6, 2017. Answers (1)
- The equation below represents a nuclear reaction in which two deuterium nuclei fuse to form Helium and X. (Solved)
The equation below represents a nuclear reaction in which two deuterium nuclei fuse to form Helium and X.
(a) Determine the values of a and b.
(b) Identify X
Date posted: June 6, 2017. Answers (1)