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How does the Stack data type work?

A Stack is an abstract data type (ADT), this means its a concept rather than an implementation. I will explain the Stack ADT using the idea of a pile of plates. The pile is the Stack. With a pile of plates y...
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Answered by Sam O. • Computing tutor
1979 Views

Why is the molecule CH4 tetrahedral whereas NH3 is not?

By the VSEPR (Valence shell electron pairs repulsions) theory, even though there are four electron pairs on C and N, the presence of a lone pair of electrons on N increases the repulsions, meaning that the N...
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Answered by Paula L. • Chemistry tutor
8528 Views

What is the best way approach an analysis of poetry?

There are numerous ways to approach poetry. I would advise a student to start by chronologically making their way through, stanza by stanza, analysing language, imagery, metaphor. I would suggest that they f...
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Answered by Ella M. • English tutor
2884 Views

How should I go about revising for my upcoming speaking exam?

You've probably included sentences for particular structures, or framed around good key phrase, so don't just mememroise like speech, remember why you've written that sentence Make arsenal of phrases that ar...
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Answered by Isla G. • Spanish tutor
2967 Views

What are the different types of intermolecular forces?

There are three types of intermolecular forces; 1. Van der Waal forces 2. Dipole-dipole forces 3. Hydrogen bonding Van der waals are the weakest and hydrogen bonding is the strongest. Van der Waal forces exi...
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Answered by Iona M. • Chemistry tutor
22156 Views