A global or oval body enclosed in a membrane, found in all cells. The nucleus contains the genetic material (DNA) of the cell.קרא עוד >
Terms beginning with C
A wireless portable telephone containing a transmitter and receiver that emit and receive radio frequency (RF) electromagnetic radiation.קרא עוד >
Technology that enables the use of mobile phones. It is based on the geographic division of the communication area covered into cells, using a given number of frequencies (or channels), allowing a large number of subscribers to conduct conversations simultaneously. A mobile phone (or cellular phone) is a bi-directional instrument that can transmit and receive simultaneously.קרא עוד >
A structure carrying the genetic material, composed of DNA molecules and proteins that fold it into a three-dimensional structure.קרא עוד >
A statistical measure that describes the relationship between two variables, i.e. to what extent a change in one variable will cause a change in the second one.קרא עוד >
The amount of particles of matter or energy (photons) passing through a unit of area.The density of an electric current refers to the size of the electric charge passing through a unit of area per unit of time.Current density is measured in amperes/m2.קרא עוד >
