The cohesive force between the mercury molecules is greater than the adhesive force between the mercury and glass molecules
johnmulu answered the question on April 13, 2017 at 07:41
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The diagram in Fig. 4 shows two glass tubes of different diameters dipped in water
(Solved)
The diagram in Fig. 4 shows two glass tubes of different diameters dipped in water
Explain why h2 is greater than h1
Date posted:
April 13, 2017
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Answers (1)
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Figure 2 (a) shows the initial reading of burette used to measure the volume of oil. After 50 drops of the oil were run out, the final reading was as shown in figure 2 (b)
(Solved)
Figure 2 (a) shows the initial reading of burette used to measure the volume of oil. After 50 drops of the oil were run out, the final reading was as shown in figure 2 (b)
Determine the volume of one drop of oil
Date posted:
April 13, 2017
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Answers (1)
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Figure 1 shows a measuring cylinder containing some water
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Figure 1 shows a measuring cylinder containing some water
Determine the reading on the measuring cylinder, after three drops of water each of volume 0.6 cm3 are added.
Date posted:
April 13, 2017
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Answers (1)
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In an experiment to measure the density of a liquid, a student filled a burette with a liquid to the 0 cm 3 mark. Figure 1 shows a section of the burette showing the level of the liquid after 54.5 g of the liquid had been run out
(Solved)
In an experiment to measure the density of a liquid, a student filled a burette with a liquid to the 0 cm 3 mark. Figure 1 shows a section of the burette showing the level of the liquid after 54.5 g of the liquid had been run out
Determine the density of the liquid
Date posted:
April 13, 2017
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Answers (1)
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Figure 1 shows the reading on a burette after 55 drops of a liquid have been used.
(Solved)
Figure 1 shows the reading on a burette after 55 drops of a liquid have been used.
If the initial reading was at zero mark, determine the volume of one drop.
Date posted:
April 13, 2017
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Answers (1)
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Figure 1 shows a burette partly filed with a liquid. The burette was initially full to the mark 0. If the quantity of the liquid removed has a mass of 22 g, determine the density of the liquid
(Solved)
Figure 1 shows a burette partly filed with a liquid. The burette was initially full to the mark 0. If the quantity of the liquid removed has a mass of 22 g, determine the density of the liquid
Date posted:
April 13, 2017
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Answers (1)
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Fig 1 shows a fencing post whose length is being measured using a strip of a measuring tape
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Fig 1 shows a fencing post whose length is being measured using a strip of a measuring tape
Use this information to answer the questions
a) State the accuracy of the post
b) What is the length of the post?
Date posted:
April 13, 2017
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Answers (1)
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Fig. 1 shows a measuring cylinder, which contains water initially at level A. A solid of mass 11 g is immersed in the water, the level rises to B.
(Solved)
Fig. 1 shows a measuring cylinder, which contains water initially at level A. A solid of mass 11 g is immersed in the water, the level rises to B.
Determine the density of the solid. (Give your answer to 1 decimal point)
Date posted:
April 13, 2017
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Answers (1)
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What is meant by donor impurity in semiconductors?
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What is meant by donor impurity in semiconductors?
Date posted:
February 22, 2017
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Answers (1)
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Describe how a p-type semiconductor is formed.
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Describe how a p-type semiconductor is formed.
Date posted:
February 21, 2017
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Answers (1)
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It is observed that alpha particles have a lower penetrating power than beta particles. Explain this observation.
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It is observed that alpha particles have a lower penetrating power than beta particles. Explain this observation.
Date posted:
February 21, 2017
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Answers (1)
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Define Radioactivity?
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What is meant by Radioactivity?
Date posted:
February 21, 2017
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Answers (1)
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Define half-life of a radioactive material.
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Define the term half-life of a radioactive material.
Date posted:
February 21, 2017
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Answers (1)
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A radioactive nuclide of atomic number Z emits a beta particle and gamma rays. State the atomic number of the nuclide.
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A radioactive nuclide of atomic number Z emits a beta particle and gamma rays. State the atomic number of the nuclide.
Date posted:
February 21, 2017
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Answers (1)
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In a sample there are 5.12 x 1020 atoms of krypton -92 initially. If the half-life of krypton-92 is 3.0 s, determine the number of atoms that will have decayed after 6 s.
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In a sample there are 5.12 x 1020 atoms of krypton -92 initially. If the half-life of krypton-92 is 3.0 s, determine the number of atoms that will have decayed after 6 s.
Date posted:
February 21, 2017
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Answers (1)
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State factors that affect photoelectric emission
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State factors that affect photoelectric emission.
Date posted:
February 21, 2017
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Answers (1)
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State one application of thermionic emission.
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State the applications of thermionic emission.
Date posted:
February 21, 2017
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Answers (1)
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It is observed that when the cap of an uncharged electroscope is irradiated with light of high frequency, the leaf of electroscope rises. Explain this observation
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It is observed that when the cap of an uncharged electroscope is irradiated with light of high frequency, the leaf of electroscope rises. Explain this observation
Date posted:
February 21, 2017
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Answers (1)
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A photo of ultraviolet light having energy E falls on a photo emissive surface whose work function is T. Write an expression for maximum kinetic energy of the resulting photoelectron in terms of E and T.
(Solved)
A photo of ultraviolet light having energy E falls on a photo emissive surface whose work function is T. Write an expression for maximum kinetic energy of the resulting photoelectron in terms of E and T.
Date posted:
February 21, 2017
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Answers (1)
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Light of frequency 7.5 x 1014Hz strikes a metal surface whose work function is 4.0 x 10-19 J. Determine the kinetic energy of the emitted photoelectrons.
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Light of frequency 7.5 x 1014Hz strikes a metal surface whose work function is 4.0 x 10-19 J. Determine the kinetic energy of the emitted photoelectrons. (take planks constant h = 6.63 x 10-34Js)
Date posted:
February 21, 2017
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Answers (1)