wood smoke.
Metal dust.
Acid dust.
mineral dust eg: coal and cement.
Diesel exhaust particle.
franco crick answered the question on January 20, 2018 at 13:15
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List the two categories of suspended particulate matter that causes pollution.
(Solved)
List the two categories of suspended particulate matter that causes pollution.
Date posted:
January 20, 2018
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Answers (1)
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Describe ozone depletion and its effects.
(Solved)
Describe ozone depletion and its effects.
Date posted:
January 20, 2018
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Answers (1)
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Describe global warming and greenhouse effect in details and state their effects to environment.
(Solved)
Describe global warming and greenhouse effect in details and state their effects to environment.
Date posted:
January 20, 2018
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Answers (1)
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While heating water in a beaker, a wire gauze is placed below the beaker. Explain.
(Solved)
While heating water in a beaker, a wire gauze is placed below the beaker. Explain.
Date posted:
January 16, 2018
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Answers (1)
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How does the distance between the interference fringes and the separation distance of the slits relate?
(Solved)
How does the distance between the interference fringes and the separation distance of the slits relate?
Date posted:
January 8, 2018
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Answers (1)
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Can visible light produce interference fringes? Explain
(Solved)
Can visible light produce interference fringes? Explain
Date posted:
January 8, 2018
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Answers (1)
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Briefly explain how unpolarized light and plane polarized lights can be distinguished
(Solved)
Briefly explain how unpolarized light and plane polarized lights can be distinguished.
Date posted:
January 8, 2018
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Answers (1)
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A student makes a loud sound and hears the echo of the sound after 2.0s. If the speed of sound in air is 330.5m/s, calculate...
(Solved)
A student makes a loud sound and hears the echo of the sound after 2.0s. If the speed of sound in air is 330.5m/s, calculate the distance between the student and the object causing the echo.
Date posted:
January 7, 2018
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Answers (1)
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What do you understand by the term e.m.f of a cell?
(Solved)
What do you understand by the term e.m.f of a cell?
Date posted:
January 7, 2018
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Answers (1)
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Is it safe to stay in a car during a lightning storm? Explain.
(Solved)
Is it safe to stay in a car during a lightning storm? Explain.
Date posted:
January 7, 2018
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Answers (1)
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(i) State Snell’s law of refraction of light (ii) Give two advantages of totally internally reflecting prisms over plane...
(Solved)
(i) State Snell’s law of refraction of light
(ii) Give two advantages of totally internally reflecting prisms over plane mirrors.
Date posted:
January 7, 2018
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Answers (1)
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A form 4 student observed that his grandfather positions a book far from his eyes when reading it. Explain the type of lenses that the...
(Solved)
A form 4 student observed that his grandfather positions a book far from his eyes when reading it. Explain the type of lenses that the student should advice his grandfather to wear.
Date posted:
January 7, 2018
.
Answers (1)
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When a new dry cell is connected in series with a 2.7 ohms resistor, a current of 0.5A flows in the circuit. Determine the internal resistance...
(Solved)
When a new dry cell is connected in series with a 2.7 ohms resistor, a current of 0.5A flows in the circuit. Determine the internal resistance of the cell.
Date posted:
January 7, 2018
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Answers (1)
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Why does a gun recoil when it is fired ?
(Solved)
Why does a gun recoil when it is fired ?
Date posted:
January 7, 2018
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Answers (1)
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Water flows along a horizontal pipe of cross-section area 35^2 cm and constriction of cross section 5^2 cm . if the speed of water...
(Solved)
Water flows along a horizontal pipe of cross-section area 35^2 cm and constriction of cross section 5^2 cm . if the speed of water at the construction is 2 m/s
Calculate:
i)Continuity constant in SI unit
ii) the speed in the wide section
Date posted:
January 7, 2018
.
Answers (1)
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A boy heats 5kg of water to a temperature of 80oC. When she adds m kg of water at 15oC the mixture attains a...
(Solved)
A boy heats 5kg of water to a temperature of 80oC. When she adds m kg of water at 15oC the mixture attains a temperature of 40oC. Determine the value of m
Date posted:
January 7, 2018
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Answers (1)
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Define an echo
(Solved)
Define an echo.
Date posted:
January 6, 2018
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Answers (1)
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State the difference between lens of a camera and that of an eye.
(Solved)
State the difference between lens of a camera and that of an eye.
Date posted:
January 6, 2018
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Answers (1)
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(i) State the reason why a lamp is made of tungsten. (ii) Why is the bulb of such a lamp filled with an active gas?
(Solved)
(i) State the reason why a lamp is made of tungsten.
(ii) Why is the bulb of such a lamp filled with an active gas?
Date posted:
January 6, 2018
.
Answers (1)
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A hockey player trains on a nylon fiber surface. As he runs around, his shoes rub against the surface and he becomes positively charged.
(Solved)
A hockey player trains on a nylon fiber surface. As he runs around, his shoes rub against the surface and he becomes positively charged.
(i) Explain in terms of particles involved, how he becomes positively charged.
Date posted:
January 6, 2018
.
Answers (1)