Science

Refine Search

What is a polypoid lesion in the colon?

A sessile polyp is a type of polypoid lesion, but it doesn't have the characteristic stalk of most polypoid lesions. Flat polyps may also be found within the colon. This type of lesion doesn't have a raised surface and can be difficult to detect from the surrounding colonic mucosa.\nMost lesions found during a colonoscopy examination turn out to be polypoid lesions. A study conducted by Henry Ford Hospital found that more than half the polypoid lesions discovered during its five-year study were benign. The study found little evidence that polypoid lesions automatically lead to a colo..

Continue Reading

What will happen if we do not conserve water?

There are a number of methods for conserving water in the household, including limiting laundry and not washing dishes before putting them in the dishwasher. A report published in "Environment" stated that changing everyday routines such as these can lead to savings on water bills of 30.2 percent. It is particularly recommended to avoid flushing the toilet when it only contains urine, since the toilet is one of the biggest wastes of water in the home.

Continue Reading

What are some easy ways to explain quantum physics?

Wave-particle duality asserts that at the sub-atomic level, matter has properties of both particles and waves. In other words, it can effectively exist in multiple locations at the same time, with limited probability of being in one exact spot at a given time. This is the idea behind the electron cloud; it supplanted the idea of atoms being a miniature solar system.\nSuperposition is the idea that matter can exist in multiple states simultaneously, dependent on observation. The Schrodinger's Cat thought experiment examines this and was originally intended to refute the idea of superpositi..

Continue Reading

How much does a perk test cost?

An official perk test is more expensive when construction equipment is required or if a county requires that the test be done by a designated employee. Unofficial perk tests can be done by any landscaper.

Continue Reading

What is the difference between salt and sugar crystals?

The sugar most often used by humans is sucrose. This covalent compound is most often derived from sugar beets or sugar cane. It is composed entirely of covalently bonded carbon, oxygen and hydrogen atoms. The bond between oxygen and either carbon or hydrogen is very polar, and the configuration of the sucrose molecule makes it polar overall. It is this polar nature that allows sugar to dissolve readily in water, with its solubility increasing at higher temperatures.\nThe salt most commonly encountered by humans is sodium chloride. Sodium chloride crystals are not made of individual molecules; ..

Continue Reading

What are foliated metamorphic rocks?

Unlike non-foliated metamorphic rocks, which have a marbled appearance and form under uniform pressure, foliated metamorphic rocks form from uneven amounts of pressure. The areas of greatest pressure force minerals to line up, forming the layered bands throughout the rock.\nMetamorphic rocks form beneath Earth's surface and move up to the surface through tectonic movement. The temperature range for metamorphism is between 200 and 800 degrees Celsius. The amount of heat and pressure that a metamorphic rock undergoes determines its grade. For example, slate, phyllite, schist and gneiss are ..

Continue Reading

What is a non-Newtonian fluid?

Tomato sauce is an example of a non-Newtonian fluid which exhibits decreased viscosity when stress is applied to it. For example, when trying to get tomato sauce out of a bottle, people often hit the bottle. This stress causes the tomato sauce to behave as more of a liquid. When the stress acting on the tomato sauce is removed, it begins behaving like a solid again.

Continue Reading

What do you call a community of organisms and their nonliving environment?

Ecosystems are not defined by size. A lake or forest has the characteristics of an ecosystem, but so does a puddle or a tree. Ecosystems are most successful when they contain many diverse species. For an ecosystem to thrive, all its components must be in proper balance. For example, if an ecosystem has insufficient water, some plants die, and then organisms that use these plants as energy sources do not survive. Consequently, animals that consume those herbivores also die off.

Continue Reading

What are the benefits of krill oil?

As of 2014, CNN Health explains krill oil may be easier to absorb in the body because of phospholipids, a form of omega fatty acids that are easier to digest than plant-derived fatty acids and fish oil.\nKrill oil has a powerful antioxidant called astaxanthin, a substance that protects the heart and keeps ultraviolet radiation from damaging the eyes. WellWise explains that astaxanthin is present in the eyes, and doses of the antioxidant are sometimes recommended by optometrists to help people with dry eyes.\nCNN reveals a Canadian study that showed women who consumed krill oil for three months..

Continue Reading

What is silver nitride?

Silver nitride is produced when silver oxide or silver nitrate is dispersed in ammonia. Silver-amide or imide complex, formed from the mixture, consequently breaks down to Ag3N. The compound is poorly soluble in water, but decays in mineral acids. Detonations are expected when it is decomposed in concentrated acids, such as metallic silver and nitrogen gas.\nA reflective coating comprised of alternating thin layers of silver metal and silicon nitride is sometimes described as silver nitride. This is not real silver nitride, thus, it is not explosive.

Continue Reading
Showing 7231 to 7240 of 10000 (1000 Pages)