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What are macromolecules?

Macromolecules are made of smaller molecules. In carbohydrates and proteins these smaller particles are referred to as monomers. When two similar or identical monomers are bonded together they form a larger polymer molecule. The monomers of carbohydrates are monosaccharides or simple sugars, and when two or more of these are linked by a covalent bond it creates a disaccharide. When they are bonded together they form a complex sugar or a polysaccharide. The monomers of proteins are called amino acids, which can be strung together in different combinations known as polypeptide chains.\n\nCarbohy..

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What is the difference between annual and perennial flowers?

Near the end of the growing season for annuals, the flowers yield seeds. These seeds are used to grow annuals again the following season. When the flowers start producing seeds, it is a sign that the growing season is just about over. Some popular annuals are marigolds, zinnias and impatiens.\nSome popular perennials are daylilies, mums, roses and peonies. It is important to know what perennial varieties grow well in the geographic region. Look around at other homes or businesses in the area to find out what perennials are found often and seem to be growing well year after year.\nAside from an..

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What is "fool's gold" made of?

Pyrite is a sulfide mineral frequently found in conjunction with other sulfides. It is also sometimes found alongside gold, arsenic, nickel, silver and cobalt. Unlike gold, pyrite is susceptible to oxidation and rusting, altering both its color and its structure, making it unsuitable for construction materials. Decaying pyrite can leak sulfuric acid and cause environmental damage. Pyrite releases heat that can cause explosions in mines.

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What are the advantages of renewable energy?

Renewable energy resources reduce global warming emissions by reducing the amount of emissions produced in generating energy. The Union of Concerned Scientists (UCS) reports that electricity production contributes to one-third of U.S. global emissions. Using renewable resources could potentially cut this level in half.\nRenewable resources improve public health by reducing air pollution. Cutting down the pollution from current energy resources reduces the risk of cancer, heart attack and respiratory ailments.\nRenewable energy is constantly replenished too. The UCS states that high winds, plan..

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How does water act as a solvent?

The stronger the attraction between the water molecules and the dissolving species, the better the solute dissolves in water. Ionic salts that completely dissociate into positive and negative ions, such as sodium chloride, have a high solubility in water. Other polar substances that are soluble in water include acids and alcohols. Nonpolar substances, such as fats and oils, are generally water-insoluble.\nThe polar nature of water arises from the strength of the oxygen ion to attract the two covalent electrons between it and the two contributing hydrogen atoms more strongly than these two hydr..

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How was hydrogen discovered?

In 1671, Robert Boyle also produced hydrogen as a result of an experiment with acid and iron. It was later named by Antoine Lavoisier, a French chemist, according to Live Science.\nHydrogen is the first element listed on the periodic table and is represented by the symbol "H." The origins of the word "hydrogen" come from Greece, where "hydro" means water, and "genes" means "creator." It is the most commonly found element in the universe. It is used in hydrogen peroxide, as an element for welding and as a potential fuel source for vehicles. It was used as gas for air travel by zeppelins up unti..

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Why does the temperature drop just before sunrise?

The other point of minimum pressure occurs a few hours before sunset. The sun provides heat to the upper portions of the atmosphere, and Earth's rotation causes the redistribution of air. This process pushes air in front of the sun as it rises, leading to valleys and peaks of pressure throughout the 24-hour cycle. While these changes in air pressure are often too subtle to notice along with other weather changes, when the conditions are right, a drop in air temperature before sunset is noticeable.

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What device converts direct current into alternating current?

Electrical current pertains to the movement of charged particles through a medium called a conductor. The two primary types of electrical current are DC and AC, which mainly vary in their direction of flow. While DC is continuous and unidirectional, AC generates a wave-like or sinusoidal pattern, which enables it to reverse its directional flow multiple times. In the modern world, most power machines are designed to accept AC power. In the absence of an AC supply, it is necessary to convert DC into AC to operate these electrical devices.Modified sine wave and pure sine wave power inverters are..

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Has India sent artificial satellites into space?

In April of 2009, ANUSAT was launched into space as a joint project between the Indian Space Research Organization and an Indian university. The program was part of the organization's student program and was the first satellite built by a university in India. The nation has launched a range of small satellites for research purposes as well. These satellites collect and report data relating to the Earth's atmosphere and test emerging technologies related to payload development, orbit controls and recovery technology.

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Does it snow over the ocean ?

Cool air over warm water causes rapid condensation. The warm, wet air at the water's surface rises and begins to cool down quickly, forming snow clouds in cold temperatures. When this phenomenon occurs over a lake, it is called lake-effect snow and can lead to heavy snowfall and dangerous weather conditions. When it occurs over the ocean, it is considered ocean-effect snow and usually results in weaker storm systems and smaller snow totals.

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