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ECHO 2019-20

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Kinetic: The PhyMath Quiz (Week 5)

This is going to be a weekly quiz on topics from Science and Mathematics. Every week, we will upload 5 questions. The answers to those questions will be uploaded in a week. You can try and answer them in the comments section and later match your answers with the correct ones. While answering questions, try and also mention your name, if not via an account, then at the end of your comment. Answers without names will be removed. Set 5: 1) An entity X is common between the Nobel prize winners for electron tunneling in semiconductors, the scanning tunneling microscope, and the research on superconductivity. Furthermore, X has a youtube video which is the world's "smallest" movie.  X is more than a century old.  Identify X. (Question by Deepanshu, I Physics) 2) Physicist X who started out by studying electrical engineering had his colleagues jokingly name X as a unit which meant one word per hour , due to his shy nature. He once said that he owed a lot to his engineering...
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MEASURING QUANTITIES - units, SI units and recent accomplishments.

  Early on in our history on Earth, we humans realized the importance of measuring quantities. This happened much before scientists needed to measure things accurately to be able to develop our understanding of the world. It was important even in daily life. To get paid for the wheat a farmer produced, it needed to be weighed. How heavy is the produce? - Mass . How far is that lake? - Distance or Length . How much time would it take for the enemy army to attack us based on their current location? - Time . The answers to these questions were much more a necessity than curiosity. So, we learned to count and measure, albeit differently in different areas. But the idea everywhere was the same - the need to know quantities in numbers. After this the idea of units is easily understood. Example: if one wants to know the length of a piece of clothing, just measure it with respect to something. Call that something one ‘unit’ of length. Like measure it with the span of your hand and say it's...
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Kinetic: The PhyMath Quiz (Week 6)

This is going to be a weekly quiz on topics from Science and Mathematics. Every week, we will upload 5 questions. The answers to those questions will be uploaded in a week. You can try and answer them in the comments section and later match your answers with the correct ones. While answering questions, try and also mention your name, if not via an account, then at the end of your comment. Answers without names will be removed. Set 5: 1) X, Y are two colours. X is the only colour that does not have its own wavelength (excluding white-which includes all wavelengths). But rather originates in the brain when colours of two different wavelengths enter the eye, but not as the colour that would have its wavelength as the average of the two. But as an entirely new colour originated by the mind due to neurological reasons. Y is very rare for plants and animals to produce naturally through pigments. Rather, in most cases it is seen in them due to some physical modification (reflection, scatterin...
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