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Why do feet shrink?

Unless a considerable amount of weight is lost, foot length generally remains the same. However, a reduction of up to 1 1/2 shoe sizes is not unusual due to an overall reduction in the circumference of the foot. Neuropathic joint disease is most commonly associated with diabetes, although syphilis is another possible cause. The effects of both neuropathic joint disease and scleroderma are manageable, but they are not reversible.

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What is the average duration of a hurricane?

A hurricane starts as an area of low pressure known as a tropical disturbance. Hurricanes grow stronger as they draw thermal energy from warm ocean waters, but quickly lose strength once they make landfall or move into areas that have a lower water temperature. In 1994, Hurricane John became the longest-lasting hurricane on record, maintaining wind speeds and hurricane status for 31 days between August and September.

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What are the applications of phosphorus?

White phosphorus is stored underwater because it spontaneously reacts when it comes in contact with air. It is mostly used in incendiary devices and flares, and is also used as a deoxidizing agent when preparing phosphor bronze or steel. Due to its poisonous properties, it is used to make smoke screens for warfare and rat poisons. Red phosphorus is relatively stable and is less dangerous compared to white phosphorus. It is widely used in pesticides, fireworks and safety matches. Black phosphorus is the least reactive phosphorus allotrope and has no notable commercial uses. Phosphoric acid is u..

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How many watts is 8 ohms?

High resistance components, such as incandescent light bulbs, convert the current that is passed through them into light and heat. An amplifier has a rating of watts per ohm. This rating refers to the power drawn from the amplifier when used with a speaker of a specified impedance, which is also measured in ohms.

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How do absorbance and transmittance relate to one another?

Absorbance and transmittance are parameters that indicate how much light is absorbed and transmitted for a specified material thickness. The two parameters are calculated for monochromatic light, as materials interact differently with different wavelengths of light.\nA monochromatic source of radiant power (Po) is shined on a sample of thickness (t). If the beam of radiation leaving the sample has a radiative power of P, then the transmittance of the sample is calculated as: T= P/Po. The percentage transmittance, %T, is found by multiplying this value by 100.\nAbsorbance is found using the for..

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Which elements are used for making coins?

The penny has a copper core with zinc plating. It is made up of 2.5 percent copper and 97.5 percent zinc. Nickels, dimes, quarters and half-dollars are all made of copper and nickel. The nickel contains 25 percent nickel and 75 percent copper. The other three coins are all 8.33 percent nickel and 91.67 percent copper. The Native American $1 coin and Presidential $1 coin are both made of copper, zinc, manganese and nickel. The United States Mint has also used silver and gold to make coins. Two examples of U.S. coins made with these elements are the 1907 double-eagle gold coin and the American e..

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What is the boiling point of vinegar?

Although most types of vinegar boil around the same temperature ranges, the boiling points can differ depending on the amount of water present in the solution, and whether or not it is diluted with other liquids. Normal vinegar or household vinegar is typically a 4 to 6 percent solution of acetic acid that is mixed with water. The International Union of Pure and Applied Chemistry name for acetic acid is ethanoic acid, and its boiling point is around 244 F.

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What is the difference between monocot and dicot stems?

Although not all dicots can produce secondary thickening, no monocots can. Therefore, flowering plants with thickening, woody stems are dicots.\nAnother difference between monocot and dicot stems involves the role played in root development. In dicots, the lower part of the embryo forms a radicle, and the roots grow from there. In monocots, the radicle doesn't form, and the roots grow out of nodes on the stem.

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Why is genetic variation important to evolution?

Genetic variation cushions the population against change, offering organisms the flexibility to adapt. A population that has a higher variation of alleles has better chances of evolving to adapt to a changing environment. Such organisms are more likely to survive extreme conditions such as drought and disease epidemics.\nGenetic variation encompasses the diversity in gene frequencies and refers to the differences between individuals or populations. During inheritance, nucleotides are sometimes reshuffled and recombined, resulting in new recombinations that are different from the parents. Every..

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Where can you find diagrams of the heart?

Each section of the diagram can be clicked on to bring up additional, more detailed views of the heart and its structures. The heart has four chambers: the left and right atria on top, and left and right ventricles on the bottom. Unoxygenated blood enters the heart through the superior and inferior vena cava into the right atrium. It is pumped into the right ventricle and to the lungs to become oxygenated. Oxygenated blood is returned to the heart through the pulmonary veins to the left atrium. It its then pumped to the left ventricle and out of the heart via aortic valve.

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