The hardness of materials and life applications on it
Hardness of materials Some solid substances are soft at room temperature such as the rubber, and some solid substances need heat to become soft and easy to be shaped such as the metals, and...
Science Online What's new?
Determination of sea depth and fish shoals by echo
Determination of sea depth and fish shoals The sonar device is used on the ships to find the position of the sea bed, It is used to detect the sunken wrecks or the submarines...
The structure of the sperm in the male reproductive system
The sperms The testes of the adult human male produce about 2 billion sperms per day , the lifetime of a single sperm inside the female vagina ranges from 2 to 6 hours, this...
Boiling point and separation of the petroleum oil, Fractional distillation of crude oil steps
The boiling point is the temperature at which a matter begins to change from a liquid state to a gaseous state, The change of matter from the liquid state to the gaseous state is...
