Questions

No work done as there is no external external pressure in free expansion. 

Hence, Work done in a free expansion process is Zero.

In Chennai, Tamil Nadu place India's first HIV case reported in 1986 amongst the female sex workers.

Cellular respiration is the three-step process by which cells make ATP using glucose and oxygen.

Oxygen and glucose are both reactants in the process of cellular respiration. The main product of cellular respiration is ATP, waste products include carbon dioxide and water.

Plants grow in size both in height and in girth. Enlargement of cells already present cannnot contribute much to the growth. Only addition of more and more cells could increase the size of the plant considerably.

Hypnosis is a state of human consciousness involving focused attention, reduced peripheral awareness, and an enhanced capacity to respond to suggestion.

It is using a router to answer ARP requests. This will be done when the originating host believes that a destination is local, when in fact is lies beyond router.

In Germany an important system of canals has been built in the low lying land between the Baltic Heights and the mountains in the southern part of the country. The Channels cut by these Ice-age rivers and later abandoned, have made it comparatively easy to join up the present river by canals which assist considerably in the movement of heavy goods in the north German Plain