General Knowledge

The 9 Oldest Person In the World

What’s the age of the world’s oldest living person? Any guesses? Before I give you the answer, let’s look at the average life expectancy of humans from the beginning of the 19th century to the 21st century. In early 19th century...

Is Water Polar Or Nonpolar?

Water is a polar molecule because it has an unequal sharing of electrons.  A water molecule has one oxygen (negative charge) and two hydrogen atoms (positive charge).  The difference between the atoms’ electronegativity and their spatial...

What Is The Color Of A Mirror?

Mirrors reflect certain wavelengths a little more than the rest.  These wavelengths lie in the range of 495 – 570 nanometers, which the human eye perceives as green.  So technically, most common mirrors are faintly green.  You probably have...