Crazy story but true. I’ve dreamed and pondered about this exact experiment for years but never actually looked it up to see if someone did it. I found this within 5 minutes of searching. What a great experiment! Thank you for the fantastic visuals and thermal views. Thank you for posting this.
How much salt would you need to add to the hot water to make it denser than the cold. I want to show my niece that it is not Heat that rises. It is less dense liquids rise and hot water is usually less dense but not always.
I was pondering the same thing earlier. I bet the hot water would stay on the bottom if you saturate it with salt. You could also use hot water and cold oil and the oil should still be less dense.
Question my friend: They say heat desires to move toward the cold, right? If so, in the first test, do you think the heat or hot water desired to move toward the cold, but was prevented due to the density factor of the cold water underneath being more dense? What about in the second test? Did the heat or hot water desiring to move toward the cold water above play a factor? I understand the density part, but it would seem that the heat or hot water would be a factor in the movement of water from one to the other, right?
This is the exact same question i would like answered. The video seems to violate the second law of thermodynamics. Because even if the colors don't mix due to the densities the temperatures need to reach equilibrium to not violate the laws of thermodynamics. What seems to be happening is magical, and I don't believe in magic.
I think the density is the determining factor because it affects the surface area of interaction between the hot and cold. In the first experiment, the cold water is denser, so the hot water can't fall into it. Consequently, the only region where the hot and cold can mix is the plane of contact between the two. Compared to the volume of each glass, this is a very small percentage. In the second experiment, since the hot water is less dense, the cold water can fall into it and the two sample mix completely, so the region of mixing is equal to the volume of the two glasses, very much more than in the first case. Given enough time, the first experiment would eventually see the heat transfer from hot to cold, but it would also have the effects of the hot glass losing heat through the sides of the glass to the environment and heat from the environment entering the cold glass. Eventually the two glasses would reach a point where the density was close enough that mixing could begin, I would think, and ultimately the whole system would reach equilibrium with the surrounding environment.
I understand why the colors don't mix in the case of hot water atop cold water, due to the difference in densities. However, I'm really puzzled about the temperatures not reaching equilibrium on the thermal camera even after 10 mins? Thermodynamics dictates that heat flows from hot to cold body. Even if no heat was flowing between the hot water and the cold water in the glasses, both glasses would be losing heat to the environment and thus the temperature should drop (hot) or be risen (cold) in both glasses. Based on thermodynamics the video is not making any sense. Please explain, using thermodynamics equations if possible, what is happening on the thermal camera when hot water is placed on top of cold water. If this were possible then it seems that the second law of thermodynamics would be violated.
I cannot use the thermodynamics equations, but I assume that the reason why the temperatures not reaching equilibrium is because of the fact that the youtuber said to make sure to align the cups together accurately. When the cups are aligned perfectly, no outside materials can have contact with the test subject. So then, when there are no outside effects that cool down, it will stay the same. Or it can be something else like density affects more to the test subject rather than the thermodynamics.
Thanks for the view after 10 minutes. So there IS a heat convection / transfer. Someone tried to tell me that hot water in a boiler will remain hot, if you take some hot water from top and fill it up with cold water from below.
Thanks for the experiment! my sibling have this experiment as their science project, and I stumble upon your video. Now me and my sib know the full procedure of the experiment and it ended up pretty well. thanks again!
@@jave_idk7014 But the point is correct that due to thermodynamics the temperatures should reach equilibrium. An explanation is needed if this does not happen since that would have implications for the laws of thermodynamics
"hot water" and "cold water" ok, but... how cold and how hot?.. For all I know it is 20c and 40c water. It is weird to me that you don't think about informing about that before in the middle of the video. Cool experiment though.
That’s why when I take a bath and I dump the hot water in the cold water and I start washing myself I feel the warm water on one side and the cold water on the other
Crazy story but true. I’ve dreamed and pondered about this exact experiment for years but never actually looked it up to see if someone did it. I found this within 5 minutes of searching. What a great experiment! Thank you for the fantastic visuals and thermal views. Thank you for posting this.
sameee 😂😂
Why do you put only 1 drop of blue color and multiple drops of red color? Just curious if it is on purpose or just by chance.
The blue is really dark or the red is really light if you use the same amount.
How much salt would you need to add to the hot water to make it denser than the cold. I want to show my niece that it is not Heat that rises. It is less dense liquids rise and hot water is usually less dense but not always.
I was pondering the same thing earlier. I bet the hot water would stay on the bottom if you saturate it with salt. You could also use hot water and cold oil and the oil should still be less dense.
Cold oil. Obvious after you say it but I had not thought about that. Brilliant. Thank you.
Question my friend: They say heat desires to move toward the cold, right? If so, in the first test, do you think the heat or hot water desired to move toward the cold, but was prevented due to the density factor of the cold water underneath being more dense? What about in the second test? Did the heat or hot water desiring to move toward the cold water above play a factor? I understand the density part, but it would seem that the heat or hot water would be a factor in the movement of water from one to the other, right?
This is the exact same question i would like answered. The video seems to violate the second law of thermodynamics. Because even if the colors don't mix due to the densities the temperatures need to reach equilibrium to not violate the laws of thermodynamics. What seems to be happening is magical, and I don't believe in magic.
I think the density is the determining factor because it affects the surface area of interaction between the hot and cold. In the first experiment, the cold water is denser, so the hot water can't fall into it. Consequently, the only region where the hot and cold can mix is the plane of contact between the two. Compared to the volume of each glass, this is a very small percentage. In the second experiment, since the hot water is less dense, the cold water can fall into it and the two sample mix completely, so the region of mixing is equal to the volume of the two glasses, very much more than in the first case. Given enough time, the first experiment would eventually see the heat transfer from hot to cold, but it would also have the effects of the hot glass losing heat through the sides of the glass to the environment and heat from the environment entering the cold glass. Eventually the two glasses would reach a point where the density was close enough that mixing could begin, I would think, and ultimately the whole system would reach equilibrium with the surrounding environment.
Perfect... thanks for sharing! My students will enjoy doing it.
This is excellent teaching material - clear, concise and well-structured. Thank you :)
Clear Words C:
I have seen many videos and all those were nice and it worked. But Which app is used for the thermal camera??
I used the Seek Compact Pro Thermal Camera which costs around 500$ and attaches to a smartphone.
Oh ok thank you
MOAR!
Great to see you back, my dood!
I understand why the colors don't mix in the case of hot water atop cold water, due to the difference in densities. However, I'm really puzzled about the temperatures not reaching equilibrium on the thermal camera even after 10 mins? Thermodynamics dictates that heat flows from hot to cold body. Even if no heat was flowing between the hot water and the cold water in the glasses, both glasses would be losing heat to the environment and thus the temperature should drop (hot) or be risen (cold) in both glasses. Based on thermodynamics the video is not making any sense. Please explain, using thermodynamics equations if possible, what is happening on the thermal camera when hot water is placed on top of cold water. If this were possible then it seems that the second law of thermodynamics would be violated.
I cannot use the thermodynamics equations, but I assume that the reason why the temperatures not reaching equilibrium is because of the fact that the youtuber said to make sure to align the cups together accurately. When the cups are aligned perfectly, no outside materials can have contact with the test subject. So then, when there are no outside effects that cool down, it will stay the same. Or it can be something else like density affects more to the test subject rather than the thermodynamics.
yes u makeing more videos now r the best
Yo
super helpful, thanks!
My school teacher is doing a test in this
Same With Me Too
Same Same Same
Same
Oop-
Same
Do the cups need to be glass?
No, not at all.
When I tried both the colours got mixed ...can someone help me in finding my mistake.
Was the one on top at a significantly higher temperature and were they both relatively still (wait a minute after stirring to stack them) ?
What happens if both jars of water are at the same temperature?
They will get mixed up.
Sir im sorry to bother you i just didn’t get it well
U were saying that the density of cold water has what....?
Cold water is more dense than hot water.
whats the scientific name of it
Thanks for the view after 10 minutes.
So there IS a heat convection / transfer.
Someone tried to tell me that hot water in a boiler will remain hot, if you take some hot water from top and fill it up with cold water from below.
Thanks for the experiment! my sibling have this experiment as their science project, and I stumble upon your video. Now me and my sib know the full procedure of the experiment and it ended up pretty well. thanks again!
very use full knowledge
Instead of glass tumblers can I use steel tumblers
Loving the content, BSG
Keep em coming!
Amazing!
thank you this video help me
U are very good teacher !,
good explanation, keep rocking
'E'
Jeez this is cool
Great
Hot+Cold=Warm
this is a density test not a mixing experiment, lol
@@jave_idk7014 But the point is correct that due to thermodynamics the temperatures should reach equilibrium. An explanation is needed if this does not happen since that would have implications for the laws of thermodynamics
Hot + cold + water = hot water. Then blue + red.🤒
I like the content very much, but the music is so loud and distracting!!!!!
Why you did not post video regularly love from India😍😍
Hot water and cold water🌪🌪
UPDT
Very exciting experiment!,,,
explain how this experiment relate to the appearance of a tropical cyclone?
Image in the alternate timeline it make cobble stone and obsidian from
Minecraft
"hot water" and "cold water" ok, but... how cold and how hot?.. For all I know it is 20c and 40c water. It is weird to me that you don't think about informing about that before in the middle of the video. Cool experiment though.
2:33 OP science
This will only for that till the hot water becomes cold i think...
Once the temperature of both is the same the density will no longer be different and the random particle movement will cause them to mix.
I'd like to watch it again without the music.
I just wish that cold won
That’s why when I take a bath and I dump the hot water in the cold water and I start washing myself I feel the warm water on one side and the cold water on the other
Universe remember
I'm doing this for my ClAsS!-
nabasag jar ko, ibalik nyo yung jar ko 😓😓😓😓😓😓😓😓😓😓😓
Im litraly impresed with it because im still grade 3 😅 and in a new school and my science is hard
huh.
Density experiment for kids MALAYALAM
Its actually called youtuber
What we actually learned is that red color is stronger then blue color in the water :) :) :) :) :)
Team sub zero
I have lady