Question Why does sound travel faster in solids than in liquids, and faster in liquids than in gases (air)? Answer Sound is nothing more than a local disturbance whose propagation is facilitated by the collisions between particles; this disturbance propagates in a logitudnal wave; imagine one molecule hitting the next molecule, and then that molecule hitting the next, and so forth. The distances between molecules in solids are very small, i. e. , solids are more dense - as compared to liquids and gases. Because they are so close, than can collide very quickly, i. e. it takes less time for a molecule of the solid to 'bump' into its neighborough. Solids are packed together tighter than liquids and gases, hence sound travels fastest in solids. The distances in liquids are shorter than in
The importance comes from the fact that Afro-Asian literature is a sign of new and modern times. These times include literature from all kinds of people, from a ll places on Earth. These days, we are able to enjoy literature from all over the worldthanks to the Internet and translation services. You really can enjoy everything that the world has to offer without having to do all that much at all. But what exactly is Afro-Asian literature? Afro-Asian literature is a modern term that is used for novels, or other kinds of writings like papers and poems, that are written by individuals from mixed ethnicity(African-arab ethnicity or African-asian ethnicity) and mixed cultures. The term is relatively unknown, but the content that it stands for is becoming increasingly popular in the world. ...
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Whether you're traveling through it on a cruise ship or just stopping to watch the ships go through the Miraflores locks in Panama City, the Panama Canal is an engineering marvel. The canal links the Atlantic and Pacific Oceans, saving ships from having to travel around South America. A new set of locks allowing even larger ships to passage through the canal were opened in 2016. After France unsuccessfully attempted to build a canal through the Isthmus of Panama in the 1800s, the United States began building the canal in 1904. At the height of the canalвs construction, more than one million cubic yards of earth were moved by approximately 25,000 workers each day. The canal was completed in 1914. Learn more about the canal's history by visiting the museum connected to the viewing platform
Chemists get to ask some great questions, from БIf I set this on fire what will happen? Б to БIf I combine these elements together in the right way can I create something totally newБ? And itБs all part of the job. Seriously? Yep, as long as their question has a purpose! (And they follow the health and safety guidelines. ) What do chemists do? Chemists do some, erm, explosive work in the lab Chemists conduct experiments to study how elements work in different conditions, test how they mix, and work out what they are made up of right down to the tiniest particle. The results can be groundbreaking, colourful, explosive, or almost impossible to see. Chemists use their experiments and knowledge to develop medicines, foods, fabrics and other materials, from neon lights to shatterproof glass.
Here s a simple question for you fellow cat people. Why would a strange cat sit in the middle of your backyard at night and meow loud and pitifully? There is occasionally a cat that my DH hears meowing in our yard in the night. When we go outside we can t find him or any trace. We ve had cats in the past, although we don t have a cat now. It s been about three years since our last cat died, so I don t think there are any cat scents left. Prior to that we were frequently visited by cats who I think were looking for our cats. Tonight DH heard a cat crying in our yard again. It was cold and rainy. We were cooking fish for dinner. Maybe the cat smelled that? We would have gladly ushered the cat inside the house, offered him fish and a warm place to sleep, but when we went outside to look, no
When you write about a topic, you are usually not only presenting the perspectives of others. Your reading should help you to form and present your own conclusions. You need to acknowledge the contributions other writers and researchers have made in helping you develop strong, persuasive arguments to support your own perspectives and conclusions. You need to demonstrate that you have made this material your own. Furthermore, the reader needs to know whether your ideas and information come from reliable sources. If the sources are not identified (by correct referencing), readers may conclude that the idea or information you present is not reliable at all. There is a lot of information being shared on the Internet. And, when I say a lot of information, I mean a lot of information. An
In simple terms, phosphorescence is a process in which energy absorbed by a substance is released relatively slowly in the form of light. This is in some cases the mechanism used for "glow-in-the-dark" materials which are "charged" by exposure to light. Unlike the relatively swift reactions in fluorescence, such as those seen in a common fluorescent tube, phosphorescent materials "store" absorbed energy for a longer time, as the processes required to re-emit energy occur less often. Most photoluminescent events, in which a chemical substrate absorbs and then re-emits a of light, are fast, in the order of 10. Light is absorbed and emitted at these fast time scales in cases where the energy of the photons involved matches the available energy states and allowed transitions of the
Be wary of claims made by vitamin C supplements. Vitamin C supplements are touted as a way to "boost" and "support" the immune system. But evidence shows they won't help you stave off colds. Taking vitamin C once a cold has already started won't make it go away faster, either. Every drugstore is stocked with vitamin C supplements that claim to "support" your immune system. There's a common belief that vitamin C can help you get over a cold faster or even that it could help you stave off colds in the first place. Too bad those beliefs aren't supported by science. Back in 2007, of 29 different studies looking at the effect of vitamin C on colds. They found that taking 200 milligrams of vitamin C every single day not just on days when you're sick could make cold symptoms go away about one
Nature abhors change. The principle of inertia, one of the most fundamental laws of physics, holds that objects resist changes in their state of motion: If an object is at rest, it will stay at rest until something forces it to budge, and if it s moving, it will keep moving until ground to a halt. That s why spinning makes you dizzy. In the labyrinthine structure of the inner ear, there are three semicircular canals arranged at right angles to one another, so that each senses the movement of your head along a different axis, and all three collaborate to. The canals are filled with a fluid that sloshes around as you move. Your ears sense motion by detecting the way tiny strands of hair lining the canals wave back and forth in this moving liquid, like water plants swaying in a river