vacuum
because it's in your mum
it makes it look inverted (upside down)
It will trap the air within it till it tips over, and releases the air.
The air gets trapped, and if the glass is brought deep enough under the water the air will be pressurised and will take up less space.
This because air is present inside the empty glass which does not let the water to enter theglass . Air also offers a force which is opposite the force of water and does not let the water to enter the glass.
When filling a cup/glass with full water the card/lid will not stay up.
because the spoon is concave, making the reflection upside down
freez the water. after freezing it will be ice then you can turn a glass of water upside down without spilling the water.
If you are referring to the traditional trick, you would pick a card from the deck, then, when you are not looking, they turn flip the deck upside down (if the back is 1 side up but the front is correct up or down) then, when they open their eyes, they look for the one that is upside down and that's your card. If you are referring to a game on a website where it makes the card disappear, the ones they show you at the end are not even any of the ones shown in the beginning.
because it's in your mum
Because when you turn it upside down, the surface tension of the full glass of liquid, combined with atmopheric pressure provides just enough force to out-do gravity !
Can you be more specific as to who does this?If you mean glasses already on the table when you are seated in restaurants, having them upside down keeps dust from falling into the glass and allows them to drain if they weren't QUITE dry when placed there.
The rod creates a prism so you see the words upside down.
its a special code that you access online
The orientation of the sheets of glass in a greenhouse (top to bottom, inside to outside) do not change its function.
no noy rely but they r programed to c ery thin upside down
Lay it upside down and rub it firmly with acetone on a rough rag.