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What is a mole?

In chemistry the mole (mol) is a basic unit to describe a quantity of substance based on the number of particles (atoms or molecules) that it contains.

The nu...

Answered by Tomos P. • Chemistry tutor

4111 Views

basics of past tenses in Spanish - What is the difference between the Preterite and Imperfect?

We'll begin with how to form (or conjugate if we're being fancy) the preterite & imperfect tenses.

IR – TO GO (THIS IS A S...

Answered by Rose H. • Spanish tutor

12705 Views

Who was responsible for the outbreak of the Cold War?

Who was responsible for the outbreak of the Cold War?

Was America responsible?

· President Truman’s use of the atomic bomb in Japan could be s...

Answered by Joanna N. • History tutor

9309 Views

What is the cosine rule and when can it be used?

The cosine rule is used to find the length of a side or size of an angle.

Take a look at the triangle below:

Answered by Kulvinder L. • Maths tutor

7398 Views

Homeostasis is the maintenance of the internal environment to a constant state, despite changes to the external environment. Examples of conditions in the body which must be kept constant include body...

Answered by George W. • Biology tutor

6624 Views