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What does the percentage of acetic acid in vinegar mean?

Not surprisingly, the higher percentage of acetic acid in the vinegar, the stronger the vinegar. Vinegar typically consists of a combination of acetic acid and water. More water dilutes the power of the acetic acid. People are able to consume vinegar with a low percentage of acetic acid, up to roughly five percent. Vinegar with a higher percentage of acid, around 20 percent, often has commercial uses, such as in herbicides. Vinegars with higher acetic acid levels sometimes cause damage, including skin, eye, nose and throat irritation, without proper safety measures such as goggles and gloves.\..

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What is the importance of measurement in our life?

Nearly all professions use measurements in one form or another. Nurses have to measure out doses of medicines, record blood pressure readings and take pulses. Similarly, engineers and architects have to read blueprints with precise dimensions and markings. Other professionals that use customary measurements are surveyors, actuaries, cartographers and accountants.

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How big is a cubic yard?

Materials commonly measured and sold in cubic yards include sand, gravel, concrete, soil and mulch. One cubic yard of sand or gravel weighs approximately 2,800 pounds (1.4 tons). A cubic yard is equal to 27 cubic feet, or 46,656 cubic inches. It takes 202 gallons of water to equal one cubic yard, which is enough liquid to fill over 10 10-gallon aquariums.

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What does a tree fungus look like?

Armillaria is an example of a mushroom fungus. It takes hold around the base of a tree, producing clusters of honey-colored mushrooms with caps 1.5 to 6 inches wide. All of the spores are located on the underside of the caps. They disperse when ready, creating even larger clusters of mushrooms. This fungus also has dark brown rhizomorphs, which cling to the roots or under the bark of hardwoods; this is a secondary reproduction strategy.\nGanoderma lucidum and ganoderma applanatum are examples of fungi that form shelf-like structures. Long, flat structures often form along the tree base, spread..

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What temperature is absolute zero?

At absolute zero, atoms would occupy the lowest energy state, essentially ceasing any movement. Absolute zero is deemed theoretical and impossible to reach, though researchers at the Massachusetts Institute of Technology came close in 2003, as have other scientists. Even at temperatures close to absolute zero, matter exhibits quantum effects such as superconductivity and superfluidity. While no one person discovered absolute zero, the concept of an absolute minimal temperature was introduced by physicist Robert Boyle in 1665.

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Is frying an egg a physical or chemical change?

During a chemical change, the end substance has a different chemical composition than the starting materials. Any substance that changes form, produces gas bubbles or changes color has undergone a chemical change. A chemical change cannot be reversed. For example, once an egg has been fried, it cannot ever go back to its original form.A physical change happens when a substance changes form but keeps the same chemical composition. The change can be reversed by taking away the cause of the physical change. Salt water is a good example of physical change. Once the salt and water have been separat..

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What is the chemical composition of chalk?

Chalk derives from shells of coccoliths or algae. When these marine organisms die, their shells build up deposits that are mined to make chalk. The sticks of chalk used to write on blackboards in classrooms are made from the shells of these tiny organisms.\nChalk sticks are made by pulverizing natural chalk and adding water, various colors and clay as a binder. Artists first used chalk thousands of years ago, evidenced by the chalk drawings on cave walls.

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Do snails grow new shells?

Snails grow their original shell from larval stage to adulthood. The mantle that covers the snail's vital organs is attached to the shell itself. As the snail grows, calcium carbonate is secreted along the outer edge of the mantle. As these secretions harden, a strong shell is formed. It continues to grow until the snail is fully developed. Often a lip is formed on the edges of the shell.

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What animals live in the tundra?

The herbivores of the tundra feed on low shrubs, sedges, mosses and lichens. In addition to these plants, insects also scavenge dead animals and drink nectar from the numerous flowers. The carnivores primarily hunt herbivores, but they also consume insects and other predators from time to time. Some carnivores, for example foxes, also eat berries, seeds and fruit when they can find it.\nMost animals living in the tundra have evolved the ability to raise their young very quickly in the short summer. To survive the long, cold winters, most animals of the tundra carry a thick layer of body fat to..

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Is snow edible?

Catching snowflakes on the tongue is a traditional wintertime game, and people often melt snow for drinking water or combine it with syrup to make a homemade snow cream dessert. Having been crystallized, snow is actually purer than other forms of precipitation. It may even be purer than tap water. The only cause for concern is if the snow has become contaminated while lying on the ground. Snow gathered from the top layer of the drift is usually safest. Dirty or colored snow must be avoided in all cases. Blue or green snow probably indicates the presence of algae, and brown, black or yellow sno..

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