Top answers

What is the difference between a weak and strong acid?

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 acid only undergoes parti...
KG
Answered by Katie G. • Chemistry tutor
7664 Views

How do you calculate pressure?

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 = force / area p = f / a I...
MH
Answered by Marc H. • Science tutor
8256 Views

How do I know when to use the preterite and imperfect tenses?

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 was limit...
CP
Answered by Caitlin P. • Spanish tutor
5688 Views

How to make a noun plural

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- houses); el libro- los libros (book- books); el café- los ...
CP
Answered by Caitlin P. • Spanish tutor
5668 Views

What are 'pointers'?

pointers exist in almost all programming languages and are used literally to 'point' to a particular piece of data. They contain the address in memory of the piece of data they point to. They are a useful wa...
MP
Answered by Mark P. • Computing tutor
6334 Views