A bond energy value can also tell you the amount of energy that is given out when one mole of a particular covalent bond is formed. For example, the bond energy of a H-H bond is 436 kJ. This means ...

\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

Female naked mole rats are able to produce new eggs throughout their lifetime, the study found, unlike other mammals which have a finite number of eggs. That discovery could lead to dramatic ...