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A straw looks "bent" when it's in water because water causes light to "change course" when it moves from air into the water. The light will again be caused to change course when it leaves the water to go back into air. This is called refraction. Refraction is a fundamental property exhibited by a wave that changes mediums through which it is traveling.
Or, making it simple..
A straw seems bent because water is denser than air, so when it changes from air to water is applied it seems bent.
What else can I help you with?
What happens when you drink through a straw?
This question points up some key misconceptions about what a vacuum is.So you put a straw in your cup of water. If you look down the straw or could look through it, you would see that the level of water inside and outside the straw are exactly the same. This is because the atmosphere is pushing down on the water inside the straw, and it is pushing down equally hard on the water outside the straw. So the pressures are equal.When you suck on the straw, you are decreasing the pressure in your mouth and lowering the pressure of the air in the top of the straw. When that happens, the force of the atmosphere pushing on the water in the glass is higher than the force of gas inside the straw. The atmosphere forces the liquid up the straw into your mouth. So, in essence, you ARE NOT sucking the liquid into your mouth, the atmosphere is pushing it there.This is easily proved by an experiment. Try drinking water from a straw that is more than 20 meters tall. It won't work. At around 20 meters, the massive column of water inside the straw would be pulled down by gravity, with a force greater than the upward force caused by the atmosphere. Even if you completely evacuate the straw with a high-powered pump the water won't make it up the straw. This is why you can't pump water out of a well that is more than 20 meters deep in the ground. Anything deeper than that and you need to use a compressor to pump air at high pressure down into the well, to force the water out (essentially make the upward pressure higher than the atmosphere alone provides), or revert to the tried and true method using buckets.Of course, a similar principle applies with underground or artesian wells. The water there is already under greater pressure and will flow to the surface if given a path.
How many ounces in 1 cup water?
1 cup = 8 fluid ounces, regardless of what's in the cup. Even if it's empty.
Why does it take longer to heat a bucket of water than a cup of water?
Because there is more water in a bucket than in a cup, and more energy has to be put into the bucket of water than the little cup of water to bring them to the same temperature.
Why a cup crack when it is filled with boiling water?
When a cup is filled with boiling water, the heat from the water caused the material of the cup to experience thermal expansion. If the cup is badly made, then different parts of it will expand to different extents and this will create stresses in the material of the cup causing it to crack.
How does water get on the outside of a cup?
Water might disappear on a cup through evaporation. As the water sits, it begins to turn to a gaseous state and rises away from the cup.
What is difraction?
when something looks bent when you put a straw in a cup of water and it looks bent that is difraction
What happens to the straw placed in plastic cup full of water?
straw seems at above from the bottom and seems to be broken because water bent the rays of light as the light leaves the water it is bent or refracted from its usual straight line.
What would happen if you put a drinking straw into a half-filled cup of water?
The straw would displace the water in the cup, causing the water level inside the straw to rise above the water level in the cup due to atmospheric pressure. The water would remain at a stable height as long as the straw remains in the cup.
What would happen if you put a straw in a cup of water?
The straw will displace the water, causing the water level inside the straw to rise slightly. When you suck on the straw, you create a vacuum inside it, pulling the water up into the straw and allowing you to drink it without tilting the cup.
Why does a pencil appear bent in a cup of water?
When light travels from water to air, it changes speed and direction due to the change in medium, causing a refractive effect. This phenomenon makes the pencil appear bent at the water's surface due to the way light rays are bent as they pass through the boundary between water and air.
Where is the first water item at club penguin 2010?
The cup with the straw at the stadium at the BIG concession stand:)
How do you move water from one cup to another without using any source of energy?
You can transfer water from one cup to another by using a straw or a pipette to create a siphon. Simply fill the straw with water, cover one end with your finger, place that end in the first cup, and then release your finger to let gravity transfer the water to the second cup.
Is drinking out of a straw healthier for you?
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.
Why does a pencil bend in a cup of water?
The pencil doesn't bend. The light, when it passes into or out of water, changes direction slightly. also it's refracted it looks bigger and bent but light changes the direction that's way it looks bent and bigger also our eyes see it differently.
Do you drink more when drinking through a straw?
I personally think you drink more when using a straw. I drink twice as much with a straw than tipping the cup.
Definition soda straw?
A soda straw is a small, thin tube made of plastic or paper used for drinking beverages like soda or water. It allows liquid to be drawn up through it, making it easier for someone to drink without tipping the cup or glass.
What is the most common type of paper cup lids?
straw-slot
