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To answer this question it is easiest to firstly define both a weak and strong acid.

A strong acid is an acid that completely dissociates into its component ions in solution.

A weak ac...

Pressure is the force exerted by one object on another object over a given area of contact. 

The following equation can help understand and also explain how pressure works: 

pressure =...

Both the preterite and imperfect tenses are used to describe an action that occurred in the past. Use of each will depend on the frequency of the action, whether it was completed or not, whether it wa...

With some exceptions, Spanish nouns tend to follow these rules to become plural:

Add s:

a)    If the noun ends in a vowel: la casa- las casas (house- ...