Bribe detector : Rhodamine base B extra (colourless powder) becomes red (Rhodamine FB) when it comes in contact with the weak HCl (acid) in perspiration (on palm). The colourless powder will be smeared on the bribe (currency).

Horsepower is devised by James Watt. It is the power needed to raise 550 lb through a height of 1 foot in one second.

1 hp = 4500 kgfm/min (MKS) = 746 W. 1 ft = 0.3056 m, 1 lb = 0.4506 kg. Before the invention of the steam engine, horse driven carriages were common in Britain. Later horses were replaced by Iron horses - steam engine. Hence the name horsepower.