A funnel cloud is a cone-shaped cloud composed of condensed water droplets that rotates with a column of wind and extends from a base of the cloud. However, these funnel clouds are very weak and rotate under...

Celsius and centigrade are different terms referring to the same temperature scale. Centigrade has be phased out and replaced to Celsius by the CGPM (Conference General des Poids et Measures) in 1948.

Elements are pure chemical substances that have one or one type of atom. Compounds are chemical substances that are formed from one or more elements, held together by chemical bonds.

Direct Current (DC) means that power in flows in one direction. In Direct Current, the flow of electrons is in a constant direction without changing at intervals and is accomplished by placing steady magnets...

Amplitude Modulation (AM) transmits sound by changing the signal strength. Frequency Modulation (FM) transmits sound by changing the frequency of the signal.