a. Measurement is the assigning of numbers to individuals or objects in a systematic way as a means of presenting the properties of an individual objects. These number represent the magnitude of the variable being measured.
b. Test is a tool for obtaining a sample of an individual behavior. A good test measures accurately some properties of a behavior.
c. Evaluation is the judging or determination of the worth of something often in terms of its cost, adequacy or effectiveness.
skilled writter answered the question on April 24, 2018 at 18:27
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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)
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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
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Answers (1)
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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
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Answers (1)
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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
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Answers (1)
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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
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Answers (1)
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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
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Answers (1)
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What is the difference between hard and soft magnets?
(Solved)
What is the difference between hard and soft magnets?
Date posted:
April 18, 2018
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Answers (1)
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Describe the methods of magnetizing a magnetic material.
(Solved)
Describe the methods of magnetizing a magnetic material.
Date posted:
April 18, 2018
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Answers (1)
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List the properties of magnets
(Solved)
List the properties of magnets
Date posted:
April 16, 2018
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Answers (1)
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State the applications of radioactivity
(Solved)
State the applications of radioactivity
Date posted:
April 12, 2018
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Answers (1)
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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
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Answers (1)
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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
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Answers (1)
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State the characteristics of gamma radiation
(Solved)
State the characteristics of gamma radiation
Date posted:
April 12, 2018
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Answers (1)
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State the characteristics of beta radiation
(Solved)
State the characteristics of beta radiation
Date posted:
April 12, 2018
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Answers (1)
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State the characteristics of alpha radiation
(Solved)
State the characteristics of alpha radiation
Date posted:
April 12, 2018
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Answers (1)
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What are the applications of photoelectric effect?
(Solved)
What are the applications of photoelectric effect?
Date posted:
April 12, 2018
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Answers (1)
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The threshold wavelength of a photoemissive surface is 0.45µm. calculate:
a. The threshold frequency of the surface.
b. The workfunction of the surface in eV.
c. The minimum...
(Solved)
The threshold wavelength of a photoemissive surface is 0.45µm. calculate:
a. The threshold frequency of the surface.
b. The workfunction of the surface in eV.
c. The minimum speed with which a photoelectron is emitted if the frequency of the radiation is 7.5x1014Hz.
Date posted:
April 12, 2018
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Answers (1)