A card can stay on a full glass of water because of surface tension. The cohesive forces between water molecules create a thin film on the surface that can support the weight of the card.
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500 ml = 2 glasses
miniscus mate
Yes, liquids can stay hot in glass containers because glass is a good insulator and retains heat well. However, glass may not retain heat as effectively as some other materials like metal or ceramics. It's important to be cautious when handling hot liquids in glass containers to avoid burns or breakage.
When salt is added to a glass of warm water, it can affect the temperature distribution. The dissolution of salt in water is an endothermic process, meaning it absorbs some heat, which may slightly lower the temperature of the water. However, the warm water at the bottom will still remain warmer than the surrounding environment due to its initial temperature, though the overall temperature may drop slightly. Ultimately, while the bottom may retain some warmth, the addition of salt does alter the thermal dynamics.
When filling a cup/glass with full water the card/lid will not stay up.
The card stays in place because of air pressure. When the glass is inverted, the water creates a seal against the card, preventing air from entering. The air pressure pushing up on the card is greater than the force of gravity pulling it down, keeping the card in place.
When you place a card on top of a glass and quickly invert it, the air pressure inside the glass is higher than the pressure outside. This pressure difference creates an upward force that holds the card in place until the pressure inside the glass equalizes with the pressure outside.
8 glasses of water.
Ice is less dense than water and therefore floats on water so when the glass has water in it the ice will always stay above the water.
It depends were you are, generally it would stay colder if you left it in the water
As soon as the card drops a little there is 1) a volume expansion that counteracts the displacement and 2) a thin water rim is formed between the edge of the cup and the card. If the weight of the card is low, a few grams , the surface tension of water is sufficient to prevent air from penetrating the cup. Therefore card is kept in place by the capillary force. With a card of somewhat greater weight the width of the capillary rim increases (but there is additional volume expansion to counteract the weight of the heavier card). Since the capillary force decreases with increasing width of the open edge, the weight range of cards is limited. Eventually it can no longer prevent air from rushing in. But with cards with low weights, thus a thin edge and as a consequence a high capillary force it works fine.
If the glass has a hole in the bottom and you submerge it upside down in water, the water would enter the glass through the hole until the air pressure inside and outside the glass equalize. Once this happens, the water would stay at a level inside the glass equal to the height of the water outside the glass.
An Apple, a glass of cold water, or a SMALL cup of coffee or tea.
Marbles are made out of glass they are not baked as food would be.
Glass squids stay between the surface and midwater depths of open oceans.
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