Density of a substance is the ratio of the mass and to the volume of the substance while relative density is the ratio of the density of a substance to the density of a standard, usually water for a liquid or solid, and air for a gas.
Eng melau answered the question on May 28, 2018 at 08:40
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State two advantages of a thermocouple over a mercury in glass thermometer
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State two advantages of a thermocouple over a mercury in glass thermometer
Date posted:
May 23, 2018
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Give a reason why water wets glass while mercury does not
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Give a reason why water wets glass while mercury does not
Date posted:
May 19, 2018
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Describe how to fit an iron tyre in a wheel of a train
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Describe how to fit an iron tyre in a wheel of a train.
Date posted:
May 10, 2018
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Describe how you can measure the diameter of a tennis ball.
Date posted:
May 10, 2018
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Briefly describe an experiment to show how the image is formed in a pinhole camera
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Briefly describe an experiment to show how the image is formed in a pinhole camera
Date posted:
May 7, 2018
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List applications of expansion in gases
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List applications of expansion in gases.
Date posted:
April 28, 2018
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Explain how a solar water purifier works
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Explain how a solar water purifier works.
Date posted:
April 28, 2018
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You are provided with a strong bar, a ruler and 10 kg weight. How would you use them to weight a sack of potatoes?
(Solved)
You are provided with a strong bar, a ruler and 10 kg weight. How would you use them to weight a sack of potatoes?
Date posted:
April 27, 2018
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Answers (1)
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A girl is shouting in front of the cliff from far away. She hears the echo 0.5 sec later. What is the velocity of sound in air
(Solved)
A girl is shouting in front of the cliff from far away. She hears the echo 0.5 sec later. What is the velocity of sound in air.
Date posted:
April 26, 2018
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Answers (1)
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A stop watch started 0.50 sec after the start button was pressed. The time recorded using the stopwatch for a ball bearing failing through a...
(Solved)
A stop watch started 0.50 sec after the start button was pressed. The time recorded using the stopwatch for a ball bearing failing through a liquid was 2.53 sec. Determine the time of fail?
Date posted:
April 26, 2018
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Answers (1)
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50 drops of oil have a volume of 1.0 cubic cm. If a drop of oil forms an oil patch of diameter 20cm, determine...
(Solved)
50 drops of oil have a volume of 1.0 cubic cm. If a drop of oil forms an oil patch of diameter 20cm, determine the size of the oil molecule.
Date posted:
April 25, 2018
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Answers (1)
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The water level in a burette is 27 cm³. If 88 drops of the bottle and the average volume of drop is 0.25cm³.What is the...
(Solved)
The water level in a burette is 27 cm³. If 88 drops of the bottle and the average volume of drop is 0.25cm³.What is the final water level in the burette?
Date posted:
April 25, 2018
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Answers (1)
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Describe an experiment to find the density of a solid using a density bottle
(Solved)
Describe an experiment to find the density of a solid using a density bottle
Date posted:
April 25, 2018
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Answers (1)
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State two ways of increasing pressure in solids
(Solved)
State two ways of increasing pressure in solids.
Date posted:
April 25, 2018
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Answers (1)
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Explain why ventilations are put near the roof but not near the floor
(Solved)
Explain why ventilations are put near the roof but not near the floor
Date posted:
April 24, 2018
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Define the following terms. a. Measurement b. Test c. Evaluation
(Solved)
Define the following terms. a. Measurement b. Test c. Evaluation
Date posted:
April 24, 2018
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Answers (1)
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A butcher has a beam balance and masses 0.8 kg and 3 kg. How would he measure 2.2 kg of meat on the balance at once?
(Solved)
A butcher has a beam balance and masses 0.8 kg and 3 kg. How would he measure 2.2 kg of meat on the balance at once?
Date posted:
April 24, 2018
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Answers (1)
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A car battery has 12V. 8 dry cells are equal to 12V. Explain why 8 dry cells are not able to start a car?
(Solved)
A car battery has 12V. 8 dry cells are equal to 12V. Explain why 8 dry cells are not able to start a car?
Date posted:
April 24, 2018
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Answers (1)
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Given that a kg of copper contains 10^25 atoms and that density of copper is about 9000kg/m^3,estimate the diameter of the copper atom
(Solved)
Given that a kg of copper contains 10^25 atoms and that density of copper is about 9000kg/m^3,estimate the diameter of the copper atom
Date posted:
April 23, 2018
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Answers (1)
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During a tsunami, a diver swam a depth of 10 cm. Determine the pressure exerted to him by water
(Solved)
During a tsunami, a diver swam a depth of 10 cm. Determine the pressure exerted to him by water.
Date posted:
April 23, 2018
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Answers (1)