Topics from April 2017
- What is a Compact Disc?
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- What is the principle of an autopilot?
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- What is bar code?
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- What is LPG?
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- How does a steam iron work?
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- What is the remote control of a television set?
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- What is automatic door operation?
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- What is an Alkaline Battery?
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- How is synthetic rubber made?
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- How are skyscrapers built?
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- What is a cellular phone?
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- What is star Television?
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- How is food packed in cans?
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- How does a dish washer work?
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- How does a washing machine work?
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- What is Plastic Surgery?
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- What are different types of telescopes?
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- What is Plastic?
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- What are the methods of time measurement?
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- What is dry ice?
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- How do we see clearly with spectacles?
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