Questions

450 mm Hg denotes the air pressure.

Gamma rays has the shortest wavelength and radio waves has the longest wavelength.

Allows for expansion or contraction of the trachea. Hence, so large masses of food can pass through the esophagus during swallowing.

The first oil well was dug in 1859. The oil production has since declined but it retains its name for high grade oil

The Bantu were comprised of more than 500 ethnic groups of Africa for migrations. The Bantu were experts in the form of iron metallurgy. 

The Story telling or The narrative form of paintings were the early examples of art photography which were often imitated.

Innovation is generally considered a process that brings together various novel ideas in a way that they have an impact on society. It differs from invention in that innovation refers to the use of a better and, as a result, novel idea or method, whereas invention refers more directly to the creation of the idea or method itself. Innovation differs from improvement in that innovation refers to the notion of doing something different rather than doing the same thing better.