Which of these colours in the visible spectrum has the longest wavelength?

The power of a lens in diopters is 

A man moves 6.0m East and then 10.0m N30ºE. How far is he from his starting point?

The density of water is 1g/cm\(^3\) while that of ice is 0.9g/cm\(^3\). Calculate the change in volume when 90g of ice is completely melted. 

The graphical representation of the pressure law is always a straight line passing through the origin, only if the temperature scale is