Asked in ChemistryHistory of ScienceChemical Energy
History of Science
How much weight can the surface tension of water hold?
Asked in Mechanical Engineering, Physics
Why when a thin layer of water flows along an inclined gutter different wave patterns are sometimes observed?
because water has a surface tension that likes to hold together. How much it takes to hold it together is based on what incline it is on. In this case, wave patterns are observed because the surface tension keeps a larger amount of water in one place, until the weight overcomes the surface tension, and it creates the wave pattern you see.
Asked in Clouds
Why does water form spherical droplets on some surfaces?
Asked in Elements and Compounds
What is the easy to understand definition of surfactants?
Surfactants, or surface active agents, reduce the surface tension of a liquid. What this means is it breaks the boundary on the surface of a liquid. If a bug lands on pond, the water holds it up. Actually, the water doesn't hold it up, it's the surface tension of the water holds it up. If surfactants are added to the water, the surface tension is broken up, and the bug would sink.
Asked in Science
How much can the surface of tension of water hold?
Asked in Science
Why does the surface tension of water hold up a paperclip and not soda?
If you're asking why can't soda hold up a paper weight it's because it's surface tension is less than that of water. Sodas contain other elements, including salts, sugars and gas, which lessen the number of hydrogen bonds, which is stronger than the ionic-water or Van der Waals interactions that can occur. Purer water has more hydrogen bonds, which are much stronger.
Asked in Science
Do liquids that have higher tension produce drops that are flatter or more nearly sperical ttan liquids with lowersurface tension?
Asked in Insects
How can water strider stand on water's surface?
Their legs have tiny, water-repellent hairs that hold tiny air bubbles, allowing them to skate on the surface of the water.The leg tarsi are covered with fine hairs (hair like setae) that are difficult to wet. Thus the surface tension is very great between the ends of the legs and the water, enabling the insect to "walk on water". Due to this surface tension the striders can be seen making dimples or impressions with the ends of their legs on the water surface. If the hairs become wet due to oil or detergent on the water surface, surface tension is broken and the water strider will sink.
Can a steel razor blade float in water even though steel has a higher density than water?
Asked in Chemical Engineering
What happens to the vertical component of surface energy in Young's equation?
Why does the penny with the soap hold less water than the penny without the soap?
Asked in Boats and Watercraft
Does a rectangular or circular boat hold more weight?
Asked in Space Shuttle
Why would water form nearly spherical drops onboard the space shuttle or an orbiting space station?
Asked in Science
Which factor do you think has something to do with the differences in the number of water drops a coin can hold?
There are two factors that we see in water, it's adhesive and cohesive abilities. Better put, it's the ability for water to stick to surfaces as well as stick to itself. This gives an overall "surface tension" that will develop as the bead of water grows. This amount of mass and volume will get too great, however, and the water will no longer be able to hold itself together. If you wanted to lower the surface tension, adding soap would make it so that the water would break after fewer drops.
Asked in Chemistry
How can a penny hold so much water?
There are a few different factors to consider : molecular attraction, surface tension, and gravity. Lets start with molecular attraction. Molecular attraction is basically just an easy way to say that certain molecules like to stick together. Molecular attraction is the force that causes surface tension. Surface tension is a property that makes the surface of a liquid act like a flexible membrane. It results from various weak forces acting between liquid molecules. All the molecules on the very top are pulling on eachother with greater force than the molecules underneath them, which creates the strong membrane on top that keeps the water from trickling down the sides. It is easy to see that surface tension is playing a huge role in keeping the water on top of the penny, but there is another very important factor to consider which is gravity. Gravity tries to pull the water down, so it flattens the water droplets. Once the gravity is stronger than the surface tension the droplet finally gives in an "busts." So after putting all of this information together we see that surface tension causes the water to create a membrane around itself and once there are so many water droplets that the weight is to much for the membrane can handle gravity takes over and the "giant" droplet ruptures.
What is the purpose of the phospholipid bilayer that makes up the cell membrane?
Asked in Mosquitoes
What are the breeding places of mosquitoes and how can you prevent it from happening?
Asked in Science
Do pure waters have more surface tension than soapy waters?
Yes, pure water is a one molecule based structure, which hold together better than a mixture. When soap or other chemical is added, it breaks surface tension by getting in the way of each water molecule. Try putting water drops on a penny to build a bubble, then add a small drop of soap to it, you'll see that when soap is added, the water bubble collapses.
Asked in US Coins
How many drops of water can a penny hold on its surface?
Water has a surface tension. When dropping water on a penny, people usually underestimate how much water the surface of a penny can hold. The surface tension of water is strong on a smaller surface, and when dropping water on the surface of a penny, towards 20 drops the water on the penny will look like it is bulging out a lot. It really depends, depending on which side of the penny you are using, it ranges from 6 to even 34 drops using a simple eyedropper. Because eyedroppers do not produce the exact same size of drops every time, the result is not very accurate. To be even more accurate, scientists use accurate distributing machines and a very new penny to determine how many drops of water it can hold without vibrations. There could be certain amounts of grime and dirt on a penny, depending on how old it is, which can affect how much water can be put onto it. Different types of water can also change how much a penny can hold. Tap water has certain amounts of chemicals in it, and that could also affect the weight and surface tension of the water on the penny. The height of which the water comes off from matters too, the more force of the water that comes down, the more likely the water on the penny is to splash and spill. The place the water lands on also has an effect on it. To be even more accurate, light has a mass. If light shines directly at the water on a penny, it could push it a tiny bit. This change is impossible to see, and it has basically no effect on the penny or water at all whatsoever. Remember, all tests may not be 100% accurate, and there may always be a chance that there is a better way to make a penny hold more droplets of water than the presumed "most advanced and accurate" way.