Medical diagnosis Ultrasonic waves are used nowadays in many medical investigations and laboratory tests such as detecting the sex of the embryo and his health state , This process depends on the ability of...
The metals and chemical activity the metals can be classified according to their chemical activity into three groups which are very active metals , less active metals and inactive metals .
The fetus development the fertilization occurs about two weeks after the first day of the last menstrual period , when the sperm penetrates the egg , and within 24 hours after the fertilization ,...
We must know the importance of echo in our life ,There are many applications of echo in different fields whether scientific , technical or medical such as determination of the speed of sound through...
The electric conductivity The substances can be classified according to the electric conductivity into good conductors of electricity and bad conductors of electricity , The electrical conductivity is the ability of a material to...
The fertilization process in the human The fertilization is the fusion of the nucleus of male gamete ( the sperm ) with the nucleus of the female gamete ( the ovum ) to form...
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