As the height increases the column of air reduces, its weight reduces and it therefore exerts less force per unit area.
chrispohmomanyi answered the question on October 2, 2017 at 12:55
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What is a bimetallic strip.
(Solved)
What is a bimetallic strip.
Date posted:
October 2, 2017
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Answers (1)
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Give two external factors that affect the rate of evaporation of a liquid.
(Solved)
Give two external factors that affect the rate of evaporation of a liquid.
Date posted:
October 2, 2017
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Answers (1)
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Briefly describe how you would make an electromagnet
(Solved)
Briefly describe how you would make an electromagnet
Date posted:
October 2, 2017
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Answers (1)
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Describe one practical application of the Photoelectric effect.
(Solved)
Describe one practical application of the Photoelectric effect.
Date posted:
October 2, 2017
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Answers (1)
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In a photoelectric effect experiment, light was directed incident to a metal surface. The wavelength of the light was then doubled maintaining the intensity constant....
(Solved)
In a photoelectric effect experiment, light was directed incident to a metal surface. The wavelength of the light was then doubled maintaining the intensity constant. Explain the resulting effect to:
(I) Photoelectric current
(ii). Kinetic energy of the Photoelectrons.
(iii). Work function of the metal.
Date posted:
October 2, 2017
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Answers (1)
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State two factors that affect the heating effect of current flowing through a wire.
(Solved)
State two factors that affect the heating effect of current flowing through a wire.
Date posted:
October 2, 2017
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Answers (1)
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State two factors that affect period of waves in a stretched string.
(Solved)
State two factors that affect period of waves in a stretched string.
Date posted:
October 2, 2017
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Answers (1)
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Explain why the density of the same material changes with temperature increase.
(Solved)
Explain why the density of the same material changes with temperature increase.
Date posted:
October 2, 2017
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Answers (1)
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Define atomic number.
(Solved)
Define atomic number.
Date posted:
October 2, 2017
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Answers (1)
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Define Power.
(Solved)
define Power
Date posted:
October 2, 2017
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Answers (1)
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Define work
(Solved)
Define work
Date posted:
October 2, 2017
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Answers (1)
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Define mechanical advantage.
(Solved)
Define mechanical advantage.
Date posted:
October 2, 2017
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Answers (1)
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Explain why atmospheric pressure decreases towards high altitudes.
(Solved)
Explain why atmospheric pressure decreases towards high altitudes.
Date posted:
October 2, 2017
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Answers (1)
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Explain why it is easier to hear sounds at night than during the day.
(Solved)
Explain why it is easier to hear sounds at night than during the day.
Date posted:
October 2, 2017
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Answers (1)
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Explain why evaporation is always accompanied by a cooling effect.
(Solved)
Explain why evaporation is always accompanied by a cooling effect.
Date posted:
October 2, 2017
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Answers (1)
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Explain how demagnetization is achieved by heating a magnet, using the domain theory.
(Solved)
Explain how demagnetization is achieved by heating a magnet, using the domain theory.
Date posted:
October 2, 2017
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Answers (1)
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Explain why distilled water has to be added in car batteries often.
(Solved)
Explain why distilled water has to be added in car batteries often.
Date posted:
October 2, 2017
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Answers (1)
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Explain why television or computer screens often become very dusty as compared to their neighboring surfaces.
(Solved)
Explain why television or computer screens often become very dusty as compared to their neighboring surfaces.
Date posted:
October 2, 2017
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Answers (1)
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Explain why a lady wearing sharp heeled shoes is not likely to skid on a slippery mud road.
(Solved)
Explain why a lady wearing sharp heeled shoes is not likely to skid on a slippery mud road.
Date posted:
October 2, 2017
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Answers (1)
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A bus moves round a circular bend at a constant speed of 10m/s. Explain whether it is in equilibrium.
(Solved)
A bus moves round a circular bend at a constant speed of 10m/s. Explain whether it is in equilibrium.
Date posted:
October 1, 2017
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Answers (1)