the telephone wire it is connected 2
The telephone system converts acoustic energy into electric energy
Electrical energy
loudspeaker of telephone: electrical to sound energy microphone of telephone: sound to electrical energy
green energy source
Mobiles are the best source of communication so it is the best telephone
The term clean source of energy refers to only primary energy sources as wind or solar energy. Electricity, by definition, is not a primary energy source. It is a secondary energy source that is could be produced by a clean energy source as wind or any renewable primary energy source or produced by fossil energy source as oil, natural gas, or coal.
No its not a source of energy..... geez...
waves is not a source of energy
It already is an energy source.It already is an energy source.It already is an energy source.It already is an energy source.
First, you should learn proper grammar. The telephone plays a "role" not a "roll." people could communicate from distances ADDED: None. The Industrial Revolution occurred before electricity was a viable energy-source, let alone the telephone was invented.
no its a renewable source of energy
The source of energy in stoves is HEAT ENERGY