Both, fans and blowers, are mechanical devices used for circulation of air. Based on this, they are differentiated from each other, wherein a fan circulates air around an entire room, or space, and a blower...

The various types of pencils are differentiated on the basis of their nature, hardness and the shades of the lead used to make the given pencils.

Both, the HB and No. 2 pencil, are the same type of pencils. The term HB is widely used in England, whereas the term ‘No. 2’ is widely used in America.

In Physics, a ‘line spectrum’ is a set of discrete wavelengths from gaseous atoms, whereas a ‘band spectrum’ is produced by molecules, which consist of series of closely spaced lines, called as bands and are...

A Hypothesis is an uncertain explanation regarding a phenomenon or event. It is widely used as a base for conducting tests and the results of the tests determine the acceptance or rejection of the hypothesis....