All Questions
4
questions
3
votes
2
answers
132
views
Why do wet napkins stick to mirrors or glass?
Take a dry piece of napkin & put it against a mirror ==> it falls down.
Dab it in water, oil, or alcohol ==> it now sticks / adheres to the mirror.
How can we explain this in physics terms? ...
- 196
1
vote
1
answer
1k
views
Why does water not leak from the bag?
In the picture, the plastic bag is filled with water. The sharpened pencil penetrates through the bag. However, there is no leakage.
Could you please explain why this happens?
83
votes
4
answers
8k
views
What causes the water in this fountain to reverse direction?
In a children's museum, I ran across this fountain. You can adjust the flow rate with a valve, visible at the bottom. At low flow rates, the sheet of water does more or less what you'd expect: it ...
- 9,765
179
votes
2
answers
19k
views
When separating an Oreo cookie, why does the cream stick to just one side only?
There is probably some reason for this, but I can't figure out what it is. I agree that it probably doesn't happen 100% of the time, but most all of the time, the cream is clinging to just one of the ...
- 2,637