They have a high resistance. This produces a lot of heat.
chrispohmomanyi answered the question on October 1, 2017 at 08:17
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State advantages of using mercury other than alcohol as a thermometric liquid.
(Solved)
State advantages of using mercury other than alcohol as a thermometric liquid.
Date posted:
October 1, 2017
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Answers (1)
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Distinguish between diffraction and interference as used in waves.
(Solved)
Distinguish between diffraction and interference as used in waves.
Date posted:
October 1, 2017
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Answers (1)
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Explain why sound waves are not propagated in through vacuum.
(Solved)
Explain why sound waves are not propagated in through vacuum.
Date posted:
October 1, 2017
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Answers (1)
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Describe how you would separate a mixture of graphite and nickel
(Solved)
Describe how you would separate a mixture of graphite and nickel
Date posted:
October 1, 2017
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Answers (1)
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Explain why it is dangerous for a diver to stay for long time under deep water.
(Solved)
Explain why it is dangerous for a diver to stay for long time under deep water.
Date posted:
October 1, 2017
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Answers (1)
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Explain the effect of wavelength and frequency of light as it passes from one medium to another of greater optical density.
(Solved)
Explain the effect of wavelength and frequency of light as it passes from one medium to another of greater optical density.
Date posted:
October 1, 2017
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Answers (1)
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State coulomb's law of electrostatic charges.
(Solved)
State coulomb's law of electrostatic charges.
Date posted:
October 1, 2017
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Answers (1)
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Explain why an object falling from a great height will attain a constant velocity.
(Solved)
Explain why an object falling from a great height will attain a constant velocity.
Date posted:
October 1, 2017
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Answers (1)
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Explain why vaseline is applied on terminals of a lead acid accumulator after cleaning them.
(Solved)
Explain why vaseline is applied on terminals of a lead acid accumulator after cleaning them.
Date posted:
October 1, 2017
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Answers (1)
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Explain why telephone lines are loose on a hot day and tight during a cold day.
(Solved)
Explain why telephone lines are loose on a hot day and tight during a cold day.
Date posted:
October 1, 2017
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Answers (1)
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Explain why farm tractors have wide rear tyres.
(Solved)
Explain why farm tractors have wide rear tyres.
Date posted:
October 1, 2017
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Answers (1)
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Explain how radiations may be used to ensure that containers are filled up with equal amount of content.
(Solved)
Explain how radiations may be used to ensure that containers are filled up with equal amount of content.
Date posted:
October 1, 2017
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Answers (1)
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State two properties that distinguish cathode rays from x-rays.
(Solved)
State two properties that distinguish cathode rays from x-rays.
Date posted:
October 1, 2017
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Answers (1)
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State a substance whose relative density is 1.
(Solved)
State a substance whose relative density is 1.
Date posted:
October 1, 2017
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Answers (1)
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Define relative density.
(Solved)
Define relative density.
Date posted:
October 1, 2017
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Answers (1)
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State any difference between dry cells and an accumulator.
(Solved)
State any difference between dry cells and an accumulator.
Date posted:
October 1, 2017
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Answers (1)
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An automobile electrician notices that by replacing a wire, it becomes hot and its insulation burns off. Explain the most probable mistake she made.
(Solved)
An automobile electrician notices that by replacing a wire, it becomes hot and its insulation burns off. Explain the most probable mistake she made.
Date posted:
October 1, 2017
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Answers (1)
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A student is provided with a bar magnet and a string. Explain the easiest way of identifying the poles.
(Solved)
A student is provided with a bar magnet and a string. Explain the easiest way of identifying the poles.
Date posted:
October 1, 2017
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Answers (1)
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A man fixed a large concave mirror of focal length 2 m, 160 cm from his face. State three characteristics of his image in the mirror.
(Solved)
A man fixed a large concave mirror of focal length 2 m, 160 cm from his face. State three characteristics of his image in the mirror.
Date posted:
October 1, 2017
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Answers (1)
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Hammering of a magnet demagnetizes a magnet. Explain how this takes place.
(Solved)
Hammering of a magnet demagnetizes a magnet. Explain how this takes place.
Date posted:
October 1, 2017
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Answers (1)