When the wire vibrates it sets the air inside the hollow box into vibration and a louder sound is produced.
chrispohmomanyi answered the question on October 4, 2017 at 07:42
- Two cups; a metallic one and a plastic one holding water were left outdoor overnight on a cold night. Both cups were covered. Which...(Solved)
Two cups; a metallic one and a plastic one holding water were left outdoor overnight on a cold night. Both cups were covered. Which cup will have a cooler water in the morning? Explain your choice.
Date posted: October 4, 2017. Answers (1)
- When pumping up a tyre, the more you pump the harder it becomes to pump. Explain.(Solved)
When pumping up a tyre, the more you pump the harder it becomes to pump. Explain.
Date posted: October 4, 2017. Answers (1)
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How is the human eye able to form a focused image.
Date posted: October 4, 2017. Answers (1)
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State three factors that affect the capacitance of a capacitor.
Date posted: October 4, 2017. Answers (1)
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State two changes you would make in a mercury thermometer so that it can measure temperature accurately.
Date posted: October 4, 2017. Answers (1)
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A person alighting from a moving matatu tends to spread his legs. Explain why.
Date posted: October 4, 2017. Answers (1)
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State the law that relates to the elasticity of an elastic spring when acted on by force.
Date posted: October 4, 2017. Answers (1)
- State two applications of surface tension.(Solved)
State two applications of surface tension.
Date posted: October 4, 2017. Answers (1)
- State one factor that affects the electrostatic force.(Solved)
State one factor that affects the electrostatic force.
Date posted: October 4, 2017. Answers (1)
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What is meant by the change of state?
Date posted: October 4, 2017. Answers (1)
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Explain the usefulness of a vernier scale in the vernier callipers.
Date posted: October 4, 2017. Answers (1)
- Give an example where a liquid still sinks yet it is being heated.(Solved)
Give an example where a liquid still sinks yet it is being heated.
Date posted: October 4, 2017. Answers (1)
- Explain heat transfer by conduction in solids.(Solved)
Explain heat transfer by conduction in solids.
Date posted: October 4, 2017. Answers (1)
- State two factors which affect the centripetal force of a body moving in a circle.(Solved)
State two factors which affect the centripetal force of a body moving in a circle.
Date posted: October 4, 2017. Answers (1)
- State the function of the following features in a liquid in glass thermometer.
1. Thin walled bulb
2. Thick walled stem.(Solved)
State the function of the following features in a liquid in glass thermometer.
1. Thin walled bulb
2. Thick walled stem.
Date posted: October 4, 2017. Answers (1)
- State two effects of anomalous expansion of water.(Solved)
State two effects of anomalous expansion of water.
Date posted: October 4, 2017. Answers (1)
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Give three ways in which the power of an electric motor can be increased.
Date posted: October 4, 2017. Answers (1)
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State the effect of adding sodium chloride to ice at 0 degrees.
Date posted: October 4, 2017. Answers (1)
- Explain the function of the small hole at the side of the cover of a ball point pen. (Solved)
Explain the function of the small hole at the side of the cover of a ball point pen.
Date posted: October 4, 2017. Answers (1)
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Why is the inner part of a pinhole camera painted black?
Date posted: October 4, 2017. Answers (1)