Questions

Two chords AB and PQ of a circle intersect at D inside a circle. If AD = 4 cm, DB = 6 cm, QD = 3 cm, the length of PQ is equal to

Who invented the mouse of a computer?

The phenomenon of change in direction of light when it passes from one medium to another is called

If the acceleration due to gravity on the surface of earth is g, then the acceleration due to gravity on the surface of a planet whose mass is same as that of earth and radius is twice as that of earth is _________________.

An earthquake of magnitude _________________ on Richter scale has thousand times more destructive energy than an earthquake of magnitude 4.

The _________________ is the second supersonic fighter developed by Hindustan Aeronautics Limited (HAL) after the HAL HF-24 Marut. 

Silk worms feed on

The red planet is ___________.