Topics from June 2020
- What is piezoelectricity? How is it produced?
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- What are the chief ingredients of soap?
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- What is the force that makes the car turn?
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- Who developed the oral polio vaccine? Is it more effective than Stalk’s vaccine which is given by injection?
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- Why is vibrating roller used to lay a road?
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- Which of the two do not fade out – sound or light waves?
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- Which instrument an eye specialist uses to examine a patient?
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- You pedal a bicycle, but what about a plane?
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- Why is it that we don’t react to our dreams while we are asleep?
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- What is homogenised milk?
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- We blush on some occasions, while on others, we turn pale. Why?
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- What is semiconductor?
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- Have you observed that you breathe only through one nostril, instead of both? Why?
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