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Explain, in terms of its structure, why graphite is able to be used as a lubricant

In graphite, the cations are arranged in layers (sheets of carbon atoms)The layers are able to slide over each other without interrupting the bonding within the layersHence, graphite can act as a lubricant
CJ
Answered by Charles J. • Chemistry tutor
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How do I form the present of the subjunctive in Spanish?

The present of the subjunctive form is a relatively simple form to master in Spanish. To talk about feelings of doubt, desire, emotion, necessity, or uncertainty we use the present of the subjunctive in Span...
JT
Answered by Jessica T. • Spanish tutor
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Assess the specific contribution of Thomas Muentzer to the German Reformation

Thomas Muentzer, despite being a lesser known protagonist, made some marked contributions to the German Reformation, both long term and short term. Despite rather large gaps in his history and the biographic...
Answered by • History tutor
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Analyse the methods used and the conditions which helped in the rise to power of one ruler of a single party state.

Both methods used by extremist parties and the conditions of Weimar Germany contributed to the rise of Hitler as a single-party state ruler, from a democratic to an autocratic system. The instability of the ...
Answered by • History tutor
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It is often said that literature is a voice for social commentary. How is this true of at least two works that you have read?

Literature can often be catalysed by and reflect within, a desire for social commentary that is often expressed effectively through development of the surroundings, characterization of the antagonists, as we...
Answered by • English Language tutor
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