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Tuesday, 3 December 2013


Metallograph is an instrument which photographs microstructure (the structure seen using microscope).

Monday, 7 October 2013

Bacillus thuringiensis

Bacillus thuringiensis is a bacterium species which infects and even kills a number of caterpillar species.

Thursday, 4 July 2013


Pressure occurs in a fluid when it is subjected to a force.
1 bar = 100 kPa
1 atmosphere = 1.013 bar

Thursday, 23 May 2013

Gear box

The gearbox is an important part of an automobile. It transmits power from the engine crankshaft to the rear wheels. Some important types of gear box are synchromesh gear box, sliding mesh gear box and constant mesh gear box.

Monday, 20 May 2013


The clutch is an important component of an automobile transmission system, which transmits power from the engine to the gear box at various speeds.

Wednesday, 24 April 2013

Calomel electrodes

Calomel electrode consists of solid mercurous chloride Hg2Cl2 (Calomel) in contact with mercury.