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Explain why earthquakes occur in the Himalayas

To answer explanation type questions, think through:Location: between Indian and Eurasian plates Processes: thrust (reverse) faulting, compressive stress , destructive/convergent plate boundary, continent-co...
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Answered by Eszter P. • Geology tutor
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Explain why the boiling point of PH3 is lower than the boiling point of AsH3

AsH3 is a larger molecule than PH 3 as As is lower down the periodic table, so has a higher atomic number so more electrons. Therefore AsH 3 has more electrons than PH 3 meaning that the instantaneous dipole...
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Answered by Freya O. • Chemistry tutor
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‘The use of referendums in the UK since 1975 has done little to enhance democracy.’ Discuss. (25 Marks)

Intro - define referendums and democracy. context since 1975, e.g. the increased used of referendums to decide on matters which need the approval of the people (to avoid outrage, or to give govt. actions leg...
LH
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how do you solve a linear equation where there are unknowns on each side e.g. 4(k + 7) = 12k + 4

In order to solve this equation you want to get all of the unknowns on one side of the equal sign and all of the numbers on the other side. However, before you do this, the first step is to expand the bracke...
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Answered by Molly G. • Maths tutor
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Explain why Carbon Dioxide has a linear shape with a bond angle of 180 degrees

Carbon Dioxide consists of 1 carbon atom covalently bonded to two oxygen atoms.Carbon is in group 4 and so has 4 electrons in its outer shell.Carbon shares two pairs of electrons with each of the oxygen atom...
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Answered by Richard P. • Chemistry tutor
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