Topics from June 2016
- Why do doctor’s check for the pulse and heart beat during consultation? What does it indicate and why is it felt only on the wrist and neck regions?
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- Why do people catch colds and flu more often in the winter? Are viruses transmitted more easily in damp air, is the resistance of the population reduced by the cold and lack of sunlight, or do the vir
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- How does antidandruff shampoo work?
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- What is dandruff?
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- Why do people get cramps and how does massage help?
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- What causes myopia? Can it be cured with the latest medical techniques?
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- What is dry eye syndrome? Would it help to have an air purifier in the house?
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- Why is alcohol used in cough syrups?
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- Why is the air we breathe out on a cold day visible?
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- How long can we survive without oxygen?
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- What is the basis behind human blood grouping?
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- What differentiates blood groups?
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- How does blood clot?
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- What is artificial blood?
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- How are babies preserved in incubators?
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- What is the method of testing for HIV and is it accurate?
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- Why do clothes look dark when immersed in water?
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- When I switch on my TV, audio is heard immediately but video comes only after some time. Why?
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- When watching TV and the face of the person being interviewed is obscured by large pixels of moving colour - to conceal their Identity - I can make out the elements of their face more clearly If I squ
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- Why is it that one is able to hear the ring tone and not any other noise when one dials a phone?
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- How does boiled rice act as gum?
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- As a result of a broken leg, I now have a stainless steel rod that runs down the centre of my femur. It is about a foot long and 1.5 centimetres in diameter. The fractured bone and rod are held togeth
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- Can vehicle tyres be filled with water instead of air?
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- Why are tubeless tyres not popular in India?
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- What is meant by ply rating of tyres?
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- What is the difference between radial and ordinary tyres?
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- Why is that, whatever they contain, dustbins always smell the same?
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- Why is a circle divided into 360 degrees?
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- What is non-linear editing? How is it different from linear editing?
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- What is tear gas? How does it work?
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- Why should we sit at a distance while watching the television?
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- How does a cordless phone work?
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- How does a cell phone work?
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- Why satellites are always launched from the east coast?
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- How is sound produced when the thumb and the middle finger are clicked?
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- How is sound caused by cracking of knuckles?
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- Why is TFM mentioned on soap wrappers?
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- What does the term “vacuum evaporated” printed on iodized salt packets mean?
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- How does a train stop when we pull the chain?
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- What is “vegetarian egg”? How is it different from an ordinary egg?
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- Why are most eggs egg-shaped?
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- What is food poisoning?
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- How do blotting paper and tissue paper differ from ordinary paper?
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- How does a blotting paper absorb ink?
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- Why do two-wheelers not use diesel?
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- Can LPG be used to run petrol vehicles without any harm to the engine?
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- What is bond paper? How is it different from other types of paper?
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- Does eating gelatine really make your nails stronger?
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- Why are not cutting nails and hairs, painful?
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- Why are the rear wheels of tractors much larger than the front wheels?
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- What will happen if unleaded petrol is used in two wheelers?
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- How is a four-stroke engine of a two-wheeler more eco-friendly than a two-stroke engine?
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- Why are engines fitted at the rear end in some vehicles?
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- What are the constituents of mosquito mats? Are they not harmful to human?
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- Why is it difficult to shut wooden doors in winter?
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- Why is it that we are able to drink very hot liquid but the same burns our skin if poured on the body?
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- No matter what colour of drink one consumes, when the liquid finally leaves the body the colour has gone. What happens to it?
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- How do crispy rice breakfast cereals make snap, crackle and pop sounds when you pour milk on them?
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- How do certain beverages give a feeling of freshness?
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- What is meant by empty calories got by drinking alcoholic beverages?
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- Why is red meat red and white meat white? What is the difference between the various animals that makes their flesh differently coloured?
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- What constitutes bullet-proof glass?
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- How does noise shatter glass?
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- How does a shaving brush help generate more lather from soap or shaving cream?
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- What makes honey resistant to spoilage, even at room temperature?
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- How to verify purity of honey?
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- How is it that when a small piece of paper finds it difficult fly continuously in the air, kite made out of it is able to fly easily?
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- How do we dry clean our clothes?
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- Why do we heat an iron box before pressing our clothes?
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- Why are some people left-handed? Is this type of preference restricted to humans alone?
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- Why are aero-planes not affected by lightnings?
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- Why so we experience a blinding feeling when we enter a dark room after standing in sunlight?
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- How are mummies made?
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- How does mehndhi impart colour?
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- How does a stick help people walk on ropes?
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- Why do we tap our feet in time to music?
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- How does a pencil eraser work?
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- What happens to rice when it is boiled and wheat when baked? Why is cooked food more digestible?
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- Why can’t we fry food with water instead of oil?
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- Why does a small piece of wood catch fire quickly rather than a large log of wood?
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- Why does a small piece of wood catch fire quickly rather than a large log of wood?
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- Why does the inner side of a candle flame appear dark?
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- How does churning help in separating butter from curd?
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- How does a lie detector work?
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- What is a speech synthesizer? How does it work?
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- What makes the poori swell?
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- Why do flags flutter?
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- Why do flames go upwards?
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- What is the difference between corn, sweet corn and popping corn? What makes sweet corn sweet and popping corn pop?
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- Why does a layer form on top of hot beverages such as milk and tea?
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- How does one decipher bar codes?
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- What is the black box (in planes) made off? Normally what does it do?
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- What is the difference between an air cooler and an air conditioner?
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- Where does the water for frost formation in the fridge come from?
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- What are refrigerants? How do they chill the contents inside a fridge?
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- Why do we see stars when we receive a blow on the head?
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- Is rain water hundred per cent pure? Can we use it as drinking water?
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- Is there a simple way to check the purity and genuineness of mineral water available in the market?
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- Why do water drops dance when poured on a hot plate?
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- How dowels in the beach yield good drinking water?
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- How is quantity of water in dams and reservoirs measured?
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- Why does water appear white in a waterfall though it is colour less?
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- How does water stored in a mud pot remain cool?
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- What causes monsoons?
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- How is depth of ocean measured?
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