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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 number of particles in one mole of substance is 6.0...
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Answered by Tomos P. • Chemistry tutor
4676 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 SPECIAL IRREGULAR ONE YOU NEED TO LEARN) Preterite Imperfect Fui Iba Fuiste Ibas F...
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Answered by Rose H. • Spanish tutor
13780 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 seen as a threat, especially as he did not tell Stalin about it be...
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Answered by Joanna N. • History tutor
9963 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: For this triangle we have sides a, b and c and angles A,B and C. For this triangle the cosine rule...
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Answered by Kulvinder L. • Maths tutor
7916 Views

What is homeostasis?

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 temper...
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Answered by George W. • Biology tutor
7270 Views