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When the can is heated, air molecules are expelled from the can. When sealed, the steam pressure balances the atmospheric pressure. On cooling, the steam condenses creating partial vacuum on the inside. The higher atmospheric pressure on the outside makes the can collapse.
johnmulu answered the question on February 6, 2017 at 08:48
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State Pascal's Principle of transmission of pressure in fluids.
Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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The height of the mercury column in a barometer at a place is 64 cm. What would be the height of a column of paraffin in barometer at the same place?
(Density of paraffin = 8.0 X 102kgm-3)
Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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A solid weighs 16.5 N on the surface of the moon. The force of gravity on the moon is 1.7NKg-1. Determine the mass of the solid.
Date posted: February 6, 2017. Answers (1)
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A steel needle when placed carefully on water can be made to float. When a detergent is added to the water it sinks. Explain this observation
Date posted: February 6, 2017. Answers (1)
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State ways of reducing surface tension in water.
Date posted: February 6, 2017. Answers (1)
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One factor that affect the surface tension of a liquid is the presence of impurities. State one other factor
Date posted: February 6, 2017. Answers (1)
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A bag of sugar is found to have the same weight on planet earth as an identical bag of dry sawdust on planet Jupiter. Explain why the masses of the two bags must be different.
Date posted: February 6, 2017. Answers (1)
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A metal pin was observed to float on the surface of pure water. However the pin sank when a few drops of soap solution were carefully added to the water. Explain this observation
Date posted: February 6, 2017. Answers (1)
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State the reason why water spilled on a glass surface wets the surface.
Date posted: February 6, 2017. Answers (1)
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Date posted: February 6, 2017. Answers (1)
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Give reason why the weight of the body varies from place to place.
Date posted: February 6, 2017. Answers (1)
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Name two forces that determine the shape of liquid drop on a solid surface.
Date posted: February 6, 2017. Answers (1)
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A student measured the length of a wire four times using a metre rule and obtained the following readings: 18.6 cm; 18.5 cm and 18.6 cm. Determine the length the length the student should record
Date posted: February 6, 2017. Answers (1)
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State the reason why it is not correct to quote the weight of solid objects in kilograms
Date posted: February 6, 2017. Answers (1)
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A stopwatch started 0.50s after the start button was pressed. The time recorded using the stopwatch for a ball bearing falling through a liquid was 2.53s. Determine the time of fall.
Date posted: February 6, 2017. Answers (1)
- A drug manufacturer gives the mass of the active ingredient in a tablet as 5 mg. Express this quantity in kilogramme and in standard form (Solved)
A drug manufacturer gives the mass of the active ingredient in a tablet as 5 mg. Express this quantity in kilogramme and in standard form.
Date posted: February 6, 2017. Answers (1)
- State what mechanics as a branch of physics deals with(Solved)
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Date posted: February 6, 2017. Answers (1)