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Using Newton's law of gravitation, derive a suitable formula for the escape velocity of an object at Earth's surface.

Newton's law of gravitation is; F = GMm/(r 2 ) Where G is the Universal Gravitational constant, M is the mass of Earth, m is the mass of the object and r is the radius of Earth (no values are needed for this...
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Answered by Charlie M. • Physics tutor
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How do I demonstrate good close reading in an exam?

The key to good close reading is understanding the text: read the passage through slowly and carefully, and make sure you understand what’s happening. If it’s a poem, what is the poet trying to say? Or what ...
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What are firewalls? Explain and discuss three methods they employ to secure a network. [8]

So the first thing to do for this question is break down the question into what the marks will be given for. As this question is not testing written communication you do not need to worry about writing long ...
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Answered by Bhavik M. • Computing tutor
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Compare and constrast the use of melody and instrumentation in Schoenberg's Der Kranke Mond from Pierrot Lunaire

In Schoenberg's Der Kranke Mond (1912), both melody and instrumentation are used to reflect the eerie, expressionistic style of the music. Schoenberg uses solo voice and flute throughout Der Kranke Mond, an ...
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Answered by Susanna P. • Music tutor
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Est-ce que les immigrés posent un problème ?

Aujourd'hui, avec le transport et les communications modernes, les gens sont plus motivés et peuvent se déplacer. En effet, actuellement, plus de personnes émigrent qu’au tout autre moment dans l'humanité. L...
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Answered by Olivia P. • French tutor
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