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How are amplitude and loudness related?

There are two things that contribute to our perception of sound. The first is the amplitude of the sound and the second is the frequency of the sound. Both of these things are precise measurements of sound rather than a perception.This change in loudness brought on by an increase in amplitude is not proportionate. It all comes down to waveforms and how they vibrate. It is these vibrations that make sound. Amplitude affects the size of the vibration, while the frequency affects the speed of the vibration. This is what gives sound its pitch.So, a sound with the same level of amplitude but a diff..

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What are some examples of biomimicry?

The idea for Velcro came in 1941 from Swiss engineer George de Mestral. He observed how burrs stuck to the fur of his dog. He used this concept to create a system that let hooked material attach to a nylon pad to fasten material together.\nThe Eastgate Centre building in Harare, Zimbabwe was modeled after the way termites build their homes. The mounds of termites have vents throughout that maintain air circulation. Cool air enters the lower vents, while hot air escapes from the upper openings. Eastgate builders used a similar model to construct a building that uses 10 percent less energy than ..

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What are some fall season safety tips?

Before the fall weather sets in, call a heating and cooling company to service the furnace. A specialist can inspect the furnace for leaks and make sure that everything is in working order. When it comes to fireplaces, use a fireplace screen to keep sparks from flying out of it. Also, never leave a burning fire unattended and completely put the fire out before going to bed.\nSpace heaters, while an effective way to warm up a chilly room, require venting, so it is best to vent them to the outdoors. Read the instructions on the unit before operating it. Never use stoves or ovens to heat up the h..

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What is linear density?

Long, narrow objects, such as thin rods and strings, use linear density as one of their specifications. The term is also used in drawing or printing to refer to how densely or heavily a line is drawn.\nLinear density branches out to other measurements such as linear mass density and linear charge density. Some of the units used for linear density are ounce per foot, pound per foot, ounce per inch, pound per inch and kilogram per meter.

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What is the function of the trachea?

According to WebMD, the trachea is approximately 4 inches long and less than 1 inch in diameter. It sits directly underneath the larynx, also known as the voice box, and it extends down behind the breastbone. Once it reaches the end of the breastbone, it splits into two tubes called bronchi, which are the main passageways into the lungs. One bronchus is attached to the left lung, and the other is attached to the right lung.\nApproximately 20 rings of thick cartilage surround the trachea. These rings are made of tissues and muscle, and they protect the trachea and keep it from closing shut. The..

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What happens when someone has two Y chromosomes?

Jacob's syndrome, also called XYY syndrome, arises when a man inherits an extra Y chromosome. Not everyone displays symptoms, but if they do, these can include:Learning difficulties and speech problems.Developmental delays, including muscle tone, motor skills and speaking.Undescended testicles at birth.Quiet and calm as a baby.An autism diagnosis during childhood.Difficulty growing facial hair.Learning disabilities and problems concentrating.A small penis and undersized testicles.Some men may have difficulty conceiving.Being taller than average, but with weak bones.There are no risk facto..

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What is the climate of Quebec?

Southern Quebec experiences all four seasons, with hot summers, cold, snowy winters and lots of rain year-round. This is the kind of climate that an individual traveling to Quebec would most likely encounter, because this area is the most populated part of the province.Central Quebec has long, cold winters and short, cool summers.Northern Quebec experiences an Arctic climate, which is characterized by frigid winters that last about 8 months, and a continuous layer of permafrost.

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Where can you view body muscle pictures online?

PTDirect is a website focused on physical training, and its webpage on body muscle contains several images. The illustrations are organized into groups based on location: namely, muscles of the limbs, trunk, back, and ribs. Each group receives its own chart.\nThe American Medical Association, on the other hand, hosts an atlas of the human body that displays the muscular system as a whole. Front and back views of the entire human body muscle may be viewed on separate webpages of the site. A side view is also available.

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What do biochemical tests determine?

The Mannitol Salt Agar test (MSA) is widely used by biologists and chemists to test for the presence of gram-positive bacteria, such as Staph and Strep species. This test is classified as selective and differential: the main differential ingredient in the MSA is the sugar mannitol; this substance is used to attract organisms (gram-positive bacteria) that feed on mannitol as a food source. Upon consuming the substance, these bacteria produce acidic byproducts, also called fermentation, which ultimately lower the pH of the surrounding media. The varying degrees of acidity produced by the media a..

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What is zinc chromate used for?

Zinc chromate first came into use during the late 1920s when it was developed by the Ford Motor Company. As of 2015, zinc chromate is typically used as primer on metals before they are painted. The primer works when moisture causes the zinc chromate to dissolve. The dissolved layer forms a protective shield between the outside moisture and the undissolved primer. The process continues until the primer fully dissolves away from the metal, leaving it vulnerable to corrosion.\nZinc chromate is highly toxic, and exposure to the compound can cause skin irritation and ulcers, internal organ damage, ..

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