Oil reduces the friction between the nail and the timber. Thus the nail experiences less resistive friction force and is driven easily.
chrispohmomanyi answered the question on October 17, 2017 at 06:30
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Name the most suitable instrument for measuring the diameter of a thin wire or strand of hair.
(Solved)
Name the most suitable instrument for measuring the diameter of a thin wire or strand of hair.
Date posted:
October 17, 2017
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Answers (1)
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2000 cm^3 of fresh water of density 1000 cm^3 is mixed with 3200 cm^3 of sea water of density 1025 cm^3. Calculate the density of...
(Solved)
2000 cm^3 of fresh water of density 1000 cm^3 is mixed with 3200 cm^3 of sea water of density 1025 cm^3. Calculate the density of the mixture.
Date posted:
October 16, 2017
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Answers (1)
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The mass of a substance is always constant whether an object is on the moon or the earth or any other planet. Explain.
(Solved)
The mass of a substance is always constant whether an object is on the moon or the earth or any other planet. Explain.
Date posted:
October 16, 2017
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Answers (1)
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The mass of a density bottle is 20 g when empty and 45 g when filled with water. If it is filled with liquid x...
(Solved)
The mass of a density bottle is 20 g when empty and 45 g when filled with water. If it is filled with liquid x its mass is 400 g. Calculate the density of liquid x. (density of water 1.0 g/cm^3)
Date posted:
October 16, 2017
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Answers (1)
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When using a density bottle there are some precautions that should be observed. Mention two of them.
(Solved)
When using a density bottle there are some precautions that should be observed. Mention two of them.
Date posted:
October 16, 2017
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Answers (1)
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A rectangular tank measures 25.0 m long, 10.0 m wide and 2 m high. Calculate the mass of water in the tank when it is...
(Solved)
A rectangular tank measures 25.0 m long, 10.0 m wide and 2 m high. Calculate the mass of water in the tank when it is half full. (Density of water 1000 kg/m^3, assume these measurement are internally taken).
Date posted:
October 16, 2017
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Answers (1)
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The density of mercury is 13.6 g/cm^3. Find the volume of 4000 g of mercury in m^3.
(Solved)
The density of mercury is 13.6 g/cm^3. Find the volume of 4000 g of mercury in m^3.
Date posted:
October 16, 2017
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Answers (1)
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A block of glass in the laboratory was found to be 200 g, and it measured 6 cm, 5 cm, 1 cm. Calculate the density...
(Solved)
A block of glass in the laboratory was found to be 200 g, and it measured 6 cm, 5 cm, 1 cm. Calculate the density in kg/m^3.
Date posted:
October 16, 2017
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Answers (1)
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The density of certain materials was found to be 32.5 g/cm^3. Express this in SI units.
(Solved)
The density of certain materials was found to be 32.5 g/cm^3. Express this in SI units.
Date posted:
October 16, 2017
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Answers (1)
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The density of sea water is found to 1.005 g/cm^3. Express this density in kg/m^3.
(Solved)
The density of sea water is found to 1.005 g/cm^3. Express this density in kg/m^3.
Date posted:
October 16, 2017
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Answers (1)
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State two reasons why lycopodium powder is used in the oil drop experiment.
(Solved)
State two reasons why lycopodium powder is used in the oil drop experiment.
Date posted:
October 16, 2017
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Answers (1)
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At higher temperatures, diffusion of fluids is faster than at lower temperatures. Explain.
(Solved)
At higher temperatures, diffusion of fluids is faster than at lower temperatures. Explain.
Date posted:
October 16, 2017
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Answers (1)
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State two molecular differences between a real gas and ideal gas
(Solved)
State two molecular differences between a real gas and ideal gas
Date posted:
October 16, 2017
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Answers (1)
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Explain why a liquid and not a gas is used as a hydraulic machine fluid
(Solved)
Explain why a liquid and not a gas is used as a hydraulic machine fluid
Date posted:
October 16, 2017
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Answers (1)
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The thermal conductivity of a metal increases with the increase cross-sectional area of the metal. Explain how the cross-section affects conductivity using the electron movement.
(Solved)
The thermal conductivity of a metal increases with the increase cross-sectional area of the metal. Explain how the cross-section affects conductivity using the electron movement.
Date posted:
October 16, 2017
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Answers (1)
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An air bubble expands as it rises to the surface of water in a deep pond. State the cause of this given that the temperature...
(Solved)
An air bubble expands as it rises to the surface of water in a deep pond. State the cause of this given that the temperature remains constant.
Date posted:
October 16, 2017
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Answers (1)
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Explain why Fuel tankers have loose chain under them to touch the ground as they move.
(Solved)
Explain why Fuel tankers have loose chain under them to touch the ground as they move.
Date posted:
October 16, 2017
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Answers (1)
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Explain why long trucks are fixed with many wheels
(Solved)
Explain why long trucks are fixed with many wheels
Date posted:
October 16, 2017
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Answers (1)
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Define the following terms(i)Mechanical advantage(ii)Velocity ratio(iii)Efficiency
(Solved)
Define the following terms
(i)Mechanical advantage
(ii)Velocity ratio
(iii)Efficiency
Date posted:
October 16, 2017
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Answers (1)
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State Snells' law
(Solved)
State Snells' law
Date posted:
October 16, 2017
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Answers (1)