air conduction better than bone conduction

Substance (W/m .K) Metals Stainless steel 50.2 Lead 35 Aluminium 205 Copper 385 Silver 406 Gases Air (dry) 0.024 Helium 0.15 Hydrogen 0.14 Building materials Polyurethane foam 0.024 Rock-wool 0.043..

. As a result, the quantity of carbon dioxide reduces and that of oxygen increases. Since plants use carbon dioxide and animals oxygen, the percentage of these gases in air remains fairly constant. Remember : It is interesting to note that more photosynthesis takes place in the sea than o..

. Let us now list out the applications of sound waves: (1) Submarines can be detected by the under-water sound waves produced by the propellers. (2) Some bones conduct sound and this type of bones are used to design hearing ai..

A material medium is necessary for sound propagation - Ordinarily, we hear sound, transmitted through the air. Unlike light, sound cannot pass through vacuum. This was discovered in 1654 by Otto Von Guericke. Let an electric bell be enclosed within a bell jar which is placed over a disc. ..

Minerals are inorganic nutrients. They include both metallic and non-metallic elements, which are taken by the body in the form of salts. There are 24 elements that are used in our body. They have various functions such as formation of tissues such as the bone, conduction of ner..

The gaseous envelope surrounding the Earth is called earth's atmosphere, extending to a few kilometres above the surface. The pressure exerted by the atmosphere is called atmospheric pressure. The magnitude of this pressure is nearly 1.01x10 5 N/m 2 (Refer Torricelli's experiment) at sea level. A..

Mechanism of Olfaction - The nasal passage is lined by the nasal mucosa that have hairs and mucou-secreting cells. The hairs act like filters to remove the dust particles from the inhaled air. The mucous secreted by Bowman's gland keeps the inhaled air moist. The chemicals relea..

Then term 'Xerography'; the use of Photoelectric phenomena to transfer an image from one sheet of paper to another comes from the Greek words for "dry" and "writing". Dry copying is based on the principle that materials with opposite electrical charges attract one another and that some materials ..

It is a collection of nervous tissue running along the back bone. It is, in fact, protected by the vertebral column. It is a continuation of the brain. Spinal Cord It consists of a central canal that has cerebrospinal fluid that is continuous with the fluid in the brain. The canal is..