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Because under your thumb, inside the straw, there is now a vacuum which keeps the water in.
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When a thumb is placed over the hole in the top of the straw, it seals the entry way for air. When the straw is pulled out of the water, it is to be noted that a drop or two of water falls out of the bottom but no more falls. This is because when the water droplets fall, this creates more space in the air pocket in the top part of the straw. WIth more space the pressure decrease in the air pocket. In addition, gravity is working on the water inside the straw, but these two forces do not outweigh the force of atmospheric pressure outside, as a result, the water stays within the staw.
Due to the phenomenon of refraction being caused; straw appears to be bent in water.
The light gets refracted in water. Thus the shape of the straw seems to be bent.
there is no air
Because under your thumb, inside the straw, there is now a vacuum which keeps the water in.
Because under your thumb, inside the straw, there is now a vacuum which keeps the water in.
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You can put the straw into the water and then suck, the water will come out filtered.
It's a matter of air pressure that acts on the water. When the straw is uncovered, there are two forces acting on the water inside. There is gravity, pulling the water down, and air pressure. The pressure is about the same on both ends of the straw, but on the top of the straw, the pressure pushes the water downward, and on the bottom of the straw, the pressure pushes upward. Both of the pressures are the same, so the net force is just the force of gravity pulling the water down and out of the straw. When you cover the top of the straw, you block the air from pushing down on the water. In this case, the only forces on the water are the air pressure pushing up, and gravity pulling down. However, the air pressure is a greater force than gravity, and keeps the water in the straw despite gravity's pull.
No. It's the same as drinking right from the cup. Unless your out in the wilderness and you don't have clean water, you can get straws that filter your water.
When a thumb is placed over the hole in the top of the straw, it seals the entry way for air. When the straw is pulled out of the water, it is to be noted that a drop or two of water falls out of the bottom but no more falls. This is because when the water droplets fall, this creates more space in the air pocket in the top part of the straw. WIth more space the pressure decrease in the air pocket. In addition, gravity is working on the water inside the straw, but these two forces do not outweigh the force of atmospheric pressure outside, as a result, the water stays within the staw.
Yes, plastic drinking straws will float in water.
Plain water freezes at 32 degrees F and salt water freezes at 35.42 degrees F so salt water will freeze faster. In the experiment a drinking straw is inserted into the water after one end of the straw is burned (fired) to seal it off. The straw acts as a hydrometer, which measures the density of water. It is said that after the straw is removed ice crystals form. This has been found not to be true.
she was coaght drinking a water melon milk shake with a bendey straw!
It is by; drinking Water Plugged Ears. One should drink the entire glass of water with a straw and block both of his/her ears.