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The hot air being lighter in weight tends to rise above and escape from the ventilators at the top. This allows the cool air to come in the room to take its place.
Mr Masinde answered the question on April 26, 2018 at 15:54
- 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)
- State the applications of radioactivity(Solved)
State the applications of radioactivity
Date posted: April 12, 2018. Answers (1)
- A radioactive substance has a half life of 10 hours. Calculate the percentage of the sample that remains after 25 hours.(Solved)
A radioactive substance has a half life of 10 hours. Calculate the percentage of the sample that remains after 25 hours.
Date posted: April 12, 2018. Answers (1)
- A radioactive substance is found to have an activity of 360 counts per second. 5minutes later, it was 45counts per second. Determine its half life.(Solved)
A radioactive substance is found to have an activity of 360 counts per second. 5 minutes later, it was 45 counts per second. Determine its half life.
Date posted: April 12, 2018. Answers (1)
- State the characteristics of gamma radiation(Solved)
State the characteristics of gamma radiation
Date posted: April 12, 2018. Answers (1)