Brain teasers
- Thread starter Richard Brown
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Richard Brown
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55julie55 said:
Sometimes Julie, but softly. Why?
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Richard Brown
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beavery said:
Nope.
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The container expands like a balloon and I think it's going to blow up! Not doing that anymore. It's sitting outside now, cooling off. Is this to do with particles expanding with heat and friction or speed. I notice if you get one of those pancake mixes in a container add water and shake, the same thing happens and that's cold. So with heat it speeds it up?
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Richard Brown
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leelai said:
Yes, you've got it Leelai. The container shouldn't explode. I think that shaking the hot water heats up the air in the container. The air expands etc. The warm, opened container is easily crushed and stays flat when it cools.
I see this experiment as a demonstration of physics Exactly what, I am unsure, but to do with forces created when gases expand in a confined space.
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Richard Brown
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Richard Brown said:Here's a new one.
Tell me what the following numbers relate to. A detailed breakdown of your answer would be nice.
97-99
88-91
90-93
92-95
Don't overdo the detail.
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Any takers? A cryptic clue is that farmers do this with seed, and the answer is a shared common word.
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I have one, you need to work out what this is. The answer is made up of some of the letters I've listed. This is from an app I have. No googling!
I have holes on the top and bottom
I have holes on my left and on my right
And I have holes in the middle
And yet I still hold water
O. T. E. N. H
I. G. J. O. S
N. R A. P. I
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I have holes on the top and bottom
I have holes on my left and on my right
And I have holes in the middle
And yet I still hold water
O. T. E. N. H
I. G. J. O. S
N. R A. P. I
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Richard Brown
iPF Novice
beavery said:
He was bald.
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twerppoet
iPad Fan
My guess is it has to do with how much surface area of the hot water is exposed to the air. The more surface area the faster the transfer of heat from the water to the air, and the faster the air expands. The container should expand a bit even without any shaking, but the transfer of heat to air is probably not much faster than the loss of heat from the container, so it would lack drama.
On the other hand, if you let the air escape while shaking, the container would probably collapse shortly afterwards, as per the other guess.
twerppoet
iPad Fan
Here's another science experiment one, just to make Richard happy. This might require a minor financial investment.
Take a helium ballon on a car ride and hold or tie it so that it does not touch any part of the car. As the car accelerates, brakes, and corners the ballon will move.
How does it move in relation to how the car moves?
Is this what you expected it to do?
Why does it move this way?
Take a helium ballon on a car ride and hold or tie it so that it does not touch any part of the car. As the car accelerates, brakes, and corners the ballon will move.
How does it move in relation to how the car moves?
Is this what you expected it to do?
Why does it move this way?
