Strictly speaking, there is only one ocean, the great body of salt water, which altogether covers about 72 % of the Earth's surface and surrounds the planet's great landmasses. But in more familiar terms, the one Great Ocean is divided into four principal parts, each of them known as an ocean. The Pacific covers about 18,13,00,000...

                     It is the recording of electrical activity of the heart. Electrocardiograph is theinstrument which is used to record the electrical current generated in the heart.By means of this instrument, the electrical current generated in the heart is conducted...

Copper Plating on Iron Piece If an iron piece is left at a place directly affected by the change in weather conditions, you won't have any difficulty in predicting the changes wrought on it. What do you say? It will get rusted? That's right. There's no doubt about the fact that iron starts catching rust as soon as...

Homemade Battery cell Take the wooden piece and with the help of screws attach the zinc plate on one side of it and copper plate on the other. Also secure the ends of copper wire on each bolt, as shown in the figure. Make sure that these wire ends and the screw ends inside the wooden piece do not touch each other....