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Explain how a waterfall forms with reference to the processes involved

The formation of a waterfall begins when geological differences occur in the rock over which a river flows. The most common set up is a layer of more resistant 'cap rock' lying on top of a larger layer of le...
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Answered by Hannah G. • Geography tutor
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How to write a powerful conclusion in a literature essay

Conclusions are the single most difficult aspect of an essay. It should be tight, have momentum, and feel like it wraps everything up in the process. (Just as with my tips for introductions, these are my exp...
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Answered by Alexander G. • English tutor
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How to write a powerful introduction in a literature essay

The Introduction: The introduction is not the section of the essay in which you merely introduce the topic, it also presents a fantastic opportunity to get the reader hooked on your take on the title! There ...
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Answered by Alexander G. • English tutor
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What is the point of cases in German? What is the difference between them?

German uses cases to convey information about the grammatical roles words play in a sentence. In English, this information is often conveyed using word order. The fact that German uses cases instead means th...
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Answered by Fern H. • German tutor
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Sue's brother is on a sled on top of ice (assume no friction). Sue is pulling her brother with 15 N of force at a 38 degree angle above the horizontal. Calculate the work done if she pulls him for 50 meters.

Using the equation W = F * d we know work is equal to the force in the same direction as the distance moved. To find the force in the same direction as the distance we must find the horizontal component. To ...
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Answered by Emily B. • Physics tutor
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