What is the approximately density of nucleus?

What is the approximate drop out of temperature with a corresponding increase/ decrease of about 1000 m in altitude?

What is the relation between size of nucleus R (radius) and mass number (A)?

What is approximate length of human alimentary cannal?

What is the SI unit of density.

What is the correct order of density of theses haloarenes :

What was the population density of human population in India according to 2001 and 2011 census?

Oil floating on water looks coloured due to interference of light.What should be the approximate thickness of the fiml jfor such effects to be visible?