upper half plane model

. On passing through A, only the vertical vibration of the string appears and these continue to go through B and come out finally. When the slit of board B is placed perpendicular to A, no vibrations appear to come out of B, although vibrations appear in the region between A and B. We therefore say..

, the fixed vertebrae . Human Vertebral Column With the exception of the first two cervical vertebrae, all the movable vertebrae have similar structure; A typical vertebra is a bony ring. Its hole is called the vertebral foramen . The front border of the vertebral foramen is very thick. It is known..

. When the card is flicked away with the finger the coin drops neatly into the bottle. For success in performing this trick the finger should move in horizontal plane so that the card is not tilted. Place a coin on a smooth card over a water glass. Give the edge of the card a sharp blow w..

These protistans fall under thephylum - Chryosophyta and are commonly called as diatoms . There are more than 5,000 species of diatoms. They are microscopic, unicellular, protistans which represent a major part of phytoplanktons both in fresh water and marine water. Diatoms occur in various shapes ..

Radio Carbon Dating - Radiocarbon The 1 4 C so produced is eventually converted into CO 2 , which in turn is incorporated into plants and trees by the process of photosynthesis and then finds way into animals, which eat pla..

Although the Lewis structures give an idea of the valence electrons around the atom, in reality it does not precisely locate the position of the electrons in the chemical bond. The behaviour of electrons in molecules and compounds is made by the valence bond theory in terms of the quantum mechanica..

Question: Explain the working of two devices that use solar energy. Answer: A solar heating device is one which allows collection of a large amount of heat from the sunlight in a given region and restricts the loss of heat to the surrounding in the form of radiation. The following fa..

Although Rutherford's model was enormously successful at explaining the scattering of alpha particles, there was a problem when the experimental data were used to calculate the mass of the nucleus. From the results of the scattering experiments, it was possible to calculate the charge on..

Search for the missing particle - Although Rutherford's model was enormously successful at explaining the scattering of alpha particles, there was a problem when the experimental data were used to calculate the mass of the nucleus. From the results of the scattering experiments, it was po..

Cyclohexane - In 1890, Sachse said that two puckered (non planar) models of cyclohexane are possible where the valence bonds of all the carbons were at tetrahedral angle to each other. They were found to be free from strain. One is the rigid chair form and the other the flexible boat form..