Surface tension pulls the film inside as it tries to get the smallest surface area
Githiari answered the question on January 23, 2018 at 14:15
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Two table tennis balls hang at the same level suspended from a thread a short distance apart. A stream of air is blown between the balls. Explain what happens to the balls.
Date posted: January 23, 2018. Answers (1)
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Date posted: January 23, 2018. Answers (1)
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Date posted: January 21, 2018. Answers (1)
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Date posted: January 20, 2018. Answers (1)
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Date posted: January 20, 2018. Answers (1)
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List the two categories of suspended particulate matter that causes pollution.
Date posted: January 20, 2018. Answers (1)
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Date posted: January 20, 2018. Answers (1)
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Date posted: January 20, 2018. Answers (1)
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Date posted: January 16, 2018. Answers (1)
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Define principal focus of a concave mirror(Solved)
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Date posted: January 10, 2018. Answers (1)
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Date posted: January 8, 2018. Answers (1)
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Date posted: January 8, 2018. Answers (1)
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Briefly explain how unpolarized light and plane polarized lights can be distinguished.
Date posted: January 8, 2018. 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 the distance between the student and the object causing the echo.
Date posted: January 7, 2018. Answers (1)
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What do you understand by the term e.m.f of a cell?
Date posted: January 7, 2018. Answers (1)
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Date posted: January 7, 2018. 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 mirrors.
Date posted: January 7, 2018. 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 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 of the cell.
Date posted: January 7, 2018. Answers (1)
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Why does a gun recoil when it is fired ?
Date posted: January 7, 2018. Answers (1)