When lightning discharges electricity into the air, we observe it as a flash of lightning.

In organic chemistry, indene is an important compound.

This old battery is no longer usable.

We measure power using a wattmeter.

The electrolytic capacitor is an important part of electronic equipment.

He does exercises to train his gluteus muscle every day.

We decided to install a personal electricity generation system.

He likes to make music using electronic sounds.

The properties of electrolytes are one of the important themes in physical chemistry.

This region has also experienced drastic changes in the world.