Fibers|Where Does This Cotton Wool Come From

Introduction|Can You Also Identify Some Fabric ?|Pulling A Thread From A Fabric|Fiber|Where Do These Fibers Come From?|Some Synthetic Fibers|OMR

Manchester Comes To India|Factories Come Up|The Early Entrepreneurs|Where Did The Workers Come From?

When a ferromagnetic material goes through a hysteresis loop, its theremal energy is increased. Where does this energy come from?

When you push your bicycle up on an incline the potential energy of the bicycle and yourself increses. Where does this energy come from?

If the nucleons of a nucleus are separated from each other, the total mass is increased. Where does this mass come from?

Consider an amplifier circuit using a transistor.The output power is several times greater than the input power.Where does the extra power come from?

Where does the signal to your TV set come from?