The liquid expand uniformly, expansion is measurable ( large enough), thermal
conductivity
Githiari answered the question on September 18, 2017 at 09:11
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State the assumption made when calculating the size of a molecule in the thin oil film experiment
(Solved)
State the assumption made when calculating the size of a molecule in the thin oil film experiment
Date posted:
September 18, 2017
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Answers (1)
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Show that the force driving the liquid through the U – tube is proportional to the height, h
(Solved)
Show that the force driving the liquid through the U – tube is proportional to the height, h
Date posted:
September 18, 2017
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Answers (1)
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Explain why a car feels lighter as it travels at a higher velocity.
(Solved)
Explain why a car feels lighter as it travels at a higher velocity.
Date posted:
September 18, 2017
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Answers (1)
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Water wets clean surfaces of glass but not waxed ones. Explain
(Solved)
Water wets clean surfaces of glass but not waxed ones. Explain
Date posted:
September 18, 2017
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Answers (1)
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Name all the forces acting on the mass suspended from a spring balance
(Solved)
Name all the forces acting on the mass suspended from a spring balance
Date posted:
September 18, 2017
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Answers (1)
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Explain why aquatic animals are able to survive under water when the surface is already frozen.
(Solved)
Explain why aquatic animals are able to survive under water when the surface is already frozen.
Date posted:
September 16, 2017
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Answers (1)
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State three properties of a liquid used in the thermometer
(Solved)
State three properties of a liquid used in the thermometer
Date posted:
September 16, 2017
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Answers (1)
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Explain how air enters the barrel of a Bunsen burner when the gas supply is opened.
(Solved)
Explain how air enters the barrel of a Bunsen burner when the gas supply is opened.
Date posted:
September 16, 2017
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Answers (1)
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A meter rule is balanced by masses of 18g and 12g suspended from its ends. Find the position of its pivot point.
(Solved)
A meter rule is balanced by masses of 18g and 12g suspended from its ends. Find the position of its pivot point.
Date posted:
September 16, 2017
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Answers (1)
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The volume of a fixed mass of gas collected at 73°C is 0.04m³ at normal atmospheric pressure. Determine the volume when the temperature drops to...
(Solved)
The volume of a fixed mass of gas collected at 73⁰C is 0.04m³ at normal atmospheric pressure. Determine the volume when the temperature drops to 10⁰C at the same pressure.
Date posted:
September 16, 2017
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Answers (1)
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In an experiment to estimate the size of a molecule of olive oil, a drop of oil of volume 0.24mm³ was placed on a clean...
(Solved)
In an experiment to estimate the size of a molecule of olive oil, a drop of oil of volume 0.24mm³ was placed on a clean water surface. The oil spread into a patch of area 4.2 x 10⁴mm². Estimate the size of a molecule of olive oil and express your answer in meters.
Date posted:
September 16, 2017
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Answers (1)
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Explain why the smell of a rotting body is very strong when the sun is hot as compared to early in the morning.
(Solved)
Explain why the smell of a rotting body is very strong when the sun is hot as compared to early in the morning.
Date posted:
September 16, 2017
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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.
(Solved)
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
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Answers (1)
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Why are the caps of the cell of a lead acid accumulator opened when charging the battery?
(Solved)
Why are the caps of the cell of a lead acid accumulator opened when charging the battery?
Date posted:
September 12, 2017
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Answers (1)
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Why do bus body builders build luggage compartments under the seats rather than on roof rack?
(Solved)
Why do bus body builders build luggage compartments under the seats rather than on roof rack?
Date posted:
September 9, 2017
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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.
(Solved)
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
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Answers (1)
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Figure 4 shows the cross-section of a diffusion cloud chamber used to detect radiation from radioctive sources.
(Solved)
Figure 4 shows the cross-section of a diffusion cloud chamber used to detect radiation from radioctive sources.
(i) State one function of each of the following:
Alcohol
Solid CO2
(ii) When radiation from the source enters the chamber, some white traces are observed. Explain how these traces are formed and state how the radiation is identified.
(iii) A leaf electroscope can also be used as a detector of radiation. State two advantages of the diffusion cloud chamber over the leaf electroscope as a detector.
Date posted:
June 6, 2017
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Answers (1)
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Figure 4 shows a Geiger Muller (G.M,) tube.
(Solved)
Figure 4 shows a Geiger Muller (G.M,) tube.
(i) Give the reason why the mica window is made thin
(ii) Explain how the radiation entering the tube through the window is detected by the tube.
(iii) What is the purpose of the halogen vapour?
Date posted:
June 6, 2017
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Answers (1)
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Figure 8 shows ultra-violet light striking a polished zinc plate placed on a negatively charged gold-leaf electroscope.
(Solved)
Figure 8 shows ultra-violet light striking a polished zinc plate placed on a negatively charged gold-leaf electroscope.
Explain the following observations.
(i) The leaf of the electroscope falls.
(ii) When the same experiment was repeated with a positively charged electroscope the leaf did not fall
Date posted:
June 6, 2017
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Answers (1)
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Explain how land and sea breeze occurs
(Solved)
Explain how land and sea breeze occurs.
Date posted:
June 6, 2017
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Answers (1)