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
7459 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
7942 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
5529 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
5371 Views

Why do I have to add +c when I integrate?

Why do I have to add +c when I integrate? First of all remember that you only need to include the +c if you are integrating without limits (ie you don’t have the two numbers at the top and bottom of the inte...
OC
Answered by Owen C. • Maths tutor
70274 Views