return air boxes

Jason is a member of a flying club. With a tail wind, his plane traveled 2240 mi in 5h. With a head wind, it took 7h to make the return flight over the same route. Find the plane's air speed and the wind speed, assuming both were constant. => 364, 84 or 320, 59 or 404, 64 or 384..

The resources that can be replenished by the environment are called the renewable resources. These are also called the inexhaustible resources. These resources are constantly recycled in the environment like water. This also includes resources like the solar energy, air, plants, animals, ..

Sulphur dioxide is a dangerous air pollutant because of its corrosive properties; it irritates the eyes, nose, and lungs. It is produced by combustion of coal, fuel oil, and gasoline, since these fuels contain sulphur. The sulphur content of a fuel can be reduced by refining, so tha..

Adverse Effect of Sulphur Dioxide on Environment - Sulphur dioxide is a dangerous air pollutant because of its corrosive properties; it irritates the eyes, nose, and lungs. It is produced by combustion of coal, fuel oil, and gasoline, since these fuels contain sulphur. The sulphur content..

Sonography is based on ultra sound (frequency above 20 KHz). When high frequency sound waves travel forwards, they continue to move until they make contact with an object. Then a certain amount of the sound bounces back. In medical practice, ultra sound of frequency 1 - 15 MHz in beamed into the h..

Stationary Waves - Stationary or standing waves are formed in a medium when two waves having equal amplitude and frequency moving in opposite directions along the same line, interfere in a confined space. Generally, such waves are formed by the superposition of a forward wave and the reflected wave..

is also called the voice box . The vocal cords stretch across the larynx and vibrate when the air passes through them. This vibration produces various sounds. The respiratory tract also helps in the production of sound. The portion of the tract that carries out this function ..

A solar cooker contains a box made of insulating material, with its inner surfaces blackened. The top is closed by a glass sheet. The box is closed such that the inner part does not come in contact with the outside air, there by reducing heat loss due to convection cur..

A solar cooker contains a wooden box having thermocol lining from inside. A box made aluminium is placed inside the wooden box. The inner side of the aluminium box is painted black. The top is closed by a glass sheet. A plane mirror is fixed to the hinged lid..

-haemoglobin. This compound serves as an oxygen carrier. It carries the oxygen to the cells and in the process it is reconverted into haemoglobin. It returns to the lungs to repeat the process. Carbon monoxide paralyses the respiratory organs. So, even if one is aware of its presence, one..