What happens when both of Polarizing filter in LCD screen are Horizontal
What would be the result if we replace the vertical polarizing filter in LCD device (screen) with a horizontal filter, what could we see exactly? Would we see the same if we use only one horizontal...
View ArticleWhy does paper become uneven when soaked and dried?
Pouring water on a small part of sheet of paper and then drying it makes it uneven, it gets a wave like appearance and seems to have become larger in size. Why?
View Articlewhy does the temperature of spray cans always feel cooler than the...
This question already has an answer here: Why does the gas get cold when I spray it? 9 answers
View ArticleWhy do flat cords tangle less in my pocket?
We’ve all experienced this: put a pair of earbuds in your pocket, and when they come out, they’re a tangled, knotted mess. However, you can also buy versions with flat, ribbon style cables rather than...
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Why does a diver changes his body positions before and after diving?
Before a diver dives in a pool, he changes his body positions several times. When he is about to jump from board he extends his arms and legs but sometime after jumping he closes his body in a...
View ArticleTwo people are holding either end of a couch, is one person exerting more...
I was carrying a couch with my flatmate yesterday, and I started thinking about this. Often when carrying objects like this, one person will be taller and has thus lifted his end of the couch higher...
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Real life physics problem: Why is my desktop computer affected by my plasma...
Note: this is strictly a physics question, not meant to be an advertisement I was running my desktop with a plasma ball on the side. The desktop has a touch screen enabled. I started to notice that the...
View ArticlePossible to make full loop on a swing only by “pumping legs”?
Is it possible to make a full $360^{circ}$ loop on the type of swing in a children’s playground if I power the swing only by “pumping” my legs? i.e. nobody pushes me?
View ArticleHow much harder an aluminum bat will hit a ball as compared to a wooden bat?
I was thinking like what’s the major difference between using aluminum bat and wooden bat means how much harder will an aluminum bat will hit a ball as compared to wooden bat ?
View ArticleWhy Does Moving a Cup of Coffee Up and Down whilst carrying it Make it less...
Sometimes I have a Very Full Mug of Coffee and I am trying to carry it without it spilling. I noticed that if I moved the Mug up and down when carrying it, it seemed to settle the coffee and make it...
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Is it possible to remove the last block from a the lowest layer of a Jenga...
A while back, my brother and I had a discussion about the possibility of removing the last block from the lowest layer of a Jenga tower with the layer immediately above it having only one block in it...
View ArticleShould the weaker of two air conditions be switched off?
We have two airconditioning systems in the office. For the sake of this question, let us assume the following current conditions: AC1 (old) outputs air of 26°C AC2 (new) outputs air of 18°C Office...
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Why do dead batteries bounce?
It seems like you can test if an Alkaline battery is empty by just dropping it on the floor. If it’s empty, it will bounce and fall down. Why is that? Here is a video of it:
View ArticleWhy do I always hear remote train horn at night?
This is definitely not an illusion, as many people have the same experience. I have usually lived in places miles away from train stations, which makes it unlikely to hear any train horns during the...
View Articleenergy efficiency – dryer vs hang+dehumidifer
When I have wet clothes coming out of the washing machine, I can either tumble-dry them in an electric clothes-dryer, or I can hang them to dry. But I can only hang them in a basement. The basement has...
View ArticleHow does a tightrope walker return to equilibrium?
I do not understand how tightrope walkers return themselves to equilibrium. I am not concerned with the direction along the rope or wire where their base can be large, and they are able to move their...
View Articlewhy do things stick to surfaces when left for a really long time?
I tried to move a cardboard box off the top of a cabinet, which left it on for probably years, and it was insanely difficult to remove. I don’t know why this happens, but it also seems that my feet get...
View ArticleAbout energy… created, destroyed?:/
Consider a dam, in that first the hydraulic energy due to gravitational force gets converted into mechanical energy by using turbine. Then those mechanical energy is converted into electrical energy by...
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Push a Boeing 737 on ice: Did this guy have a chance? [on hold]
In this video an airport worker (in blue) tries to prevent a Boeing 737 from sliding on ice in heavy winds: Did he even have a chance? On one side of the argument, the airplane is sliding due to the...
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Which travels further, a football or a soccer ball, when thrown?
I recently answered this question: Laminar Versus Turbulent Flow and it caused me to think of the following situation. Given that an (American) football weighs between Football 400 to 430 grams, and a...
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