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Results tagged with everyday-life
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user 56578
Concerns the application of the laws of physics to analyze common situations encountered in everyday life.
14
votes
Why do the big nuts always remain at top? The Brazil-nut Effect
I googled it and found the term Brazil-nut Effect but couldn't found
any proper explanation. What is the physical explanation of this
effect?
I answered another question on granular convect …
- 5,854
8
votes
Why is it so hard to mix spaghetti with meatballs?
When I cook spaghetti with a sauce that includes meatballs or chopped
vegetables, those stay in chunks and won't get uniformly mixed in the
pasta. Is there a simple reason for that?
I do not know if …
- 5,854
31
votes
Accepted
Why do stickers curl?
*When peeling a sticker off its base, the immediate reaction is that it curls; why is this?
on a somewhat related note, is this a similar reason for why a ribbon
curls when glided over with …
- 5,854
9
votes
Does car tire pressure change with weight of car load?
The data manufacturers provide assume the tyre pressure is adjusted with tyres cold (ambient temperature) prior to loading. Though the small error introduced by making adjustments after loading will n …
- 5,854
4
votes
Which force is responsible for victory in tug of war?
Force on the ground can never be greater than force on the rope
Each players individually exerts some force on the rope and on the ground, but that doesn't means that the same amount of work is done o …
- 5,854
12
votes
Accepted
Why is the shape of lightning or an electric spark a zig-zag line?
Why is it never just a straight line?
I think it can be interesting to answer both questions and add a few interesting details to the answer already given.
Electrons move in a straight line on …
- 5,854
8
votes
Why is the sky dark at night?
Who is interested can find detailed information at wiki, or here
The problem is known (as you added in your edit) as Olbers' paradox, and was posed already in the mid 1500's, by Johannes Kepler in 161 …
- 5,854
19
votes
6
answers
23k
views
The best way in which a man can pull a train
I have chosen this example as a paradoxical limit, but my question really regards the optimization, distribution and outcome of force when you try to pull a weight: how can you optimize your effort/en …
- 5,854