Questions

We know that, in solids all the particles are packed together and hence sound can travel from one to one very fast.

Hence, speed of sound is maximum in solids and decreses from solids to liquids and liquids to gases. Sound can't travel through vaccum.

21 May 2013 is observed as Anti terrorism Day on the Death Anniversary of Rajiv Gandhi

The term 'Vector' in recombinant DNA methods, refers to a plasmid or other agent used to transfer DNA into a living cell.

Because there is no need address traansaction between processor and peripheral device but data bus is needed because data has to be read and write

Transferring the control from one process to other process requires saving the state of the old process and loading the saved state for new process. This task is known as context switching.

Let the required number be 'X'

Condition 1 :  

$$\begin{gathered} XX = 2X \\ => 2X2 = X \\ => X = 12 \end{gathered}$$

Condition 2 :

$$\begin{gathered} X × X = X2 \\ => X = 12 \end{gathered}$$

Therefore, 12 is the number which becomes double when it is divided by itself and becomes half when it is multiplied by itself.

Longest railway bridge (Lower Zambesi ) is located in Africa