Get premium membership and access questions with answers, video lessons as well as revision papers.
if 50 drops have 1cubic cm
then one drop will have 1/50 =0.02cubic cm.
oil patch with diameter 20cm has area of 22/7*10*10=314.2857sq.cm
hence the size of oilpatch = volume of oil drop/area of oil patch
=0.02/314.2857=0.00006363cm
PROFWAMALWA answered the question on May 2, 2018 at 09:21
- 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. Answers (1)
- 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. Answers (1)
- State two ways of increasing pressure in solids(Solved)
State two ways of increasing pressure in solids.
Date posted: April 25, 2018. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- A student observed that in the morning that overhead electrical cable is straight? Explain this observation(Solved)
A student observed that in the morning that overhead electrical cable is straight? Explain this observation.
Date posted: April 23, 2018. Answers (1)
- A butcher has a beam balance and only two masses of 3.5kg and 5kg.Explain how he can manage to measure for a customer 1.5kg of...(Solved)
A butcher has a beam balance and only two masses of 3.5kg and 5kg.Explain how he can manage to measure for a customer 1.5kg of meat at once using only the two masses
Date posted: April 23, 2018. Answers (1)
- A tin containing 5000cm3 of paint has a Mass of 70kg.a)If the mass of the empty tin,including the lid,is 0.5kg,calculate the density of the paint(Solved)
A tin containing 5000cm3 of paint has a Mass of 70kg.a)If the mass of the empty tin,including the lid,is 0.5kg,calculate the density of the paint
Date posted: April 23, 2018. Answers (1)
- Explain how the volatile liquid in a refrigerator is made to vaporize in the cooling compartment and to condense in the cooling fins
(Solved)
Explain how the volatile liquid in a refrigerator is made to vaporize in the cooling compartment and to condense in the cooling fins
Date posted: April 22, 2018. Answers (1)
- Given that a kg of copper contains about 10^25 atoms and that the density of copper is about 9000kg/m^3.estimate the diameter of the copper atoms?State...(Solved)
Given that a kg of copper contains about 10^25 atoms and that the density of copper is about 9000kg/m^3. Estimate the diameter of the copper atoms?
State the assumption made.
Date posted: April 19, 2018. Answers (1)
- List the applications/uses of magnets.
(Solved)
List the applications/uses of magnets.
Date posted: April 18, 2018. Answers (1)
- What is the difference between hard and soft magnets?(Solved)
What is the difference between hard and soft magnets?
Date posted: April 18, 2018. Answers (1)
- Explain the methods of de-magnetizing a magnetic material.
(Solved)
Explain the methods of de-magnetizing a magnetic material.
Date posted: April 18, 2018. Answers (1)
- Describe the methods of magnetizing a magnetic material.(Solved)
Describe the methods of magnetizing a magnetic material.
Date posted: April 18, 2018. Answers (1)
- List the characteristics of magnetic field patterns.
(Solved)
List the characteristics of magnetic field patterns.
Date posted: April 18, 2018. Answers (1)
- List the properties of magnets(Solved)
List the properties of magnets
Date posted: April 16, 2018. Answers (1)