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Why do elements give off coloured light when heated?

When elements are heated, it causes their electrons to become excited. Electrons exist in discrete energy levels, and these energy levels are unique to each element. When the electrons are excited by heat...

GC
Answered by Gemma C. Chemistry tutor
15141 Views

Brainstorm whether the NHS is an example of Government failure

Define Government failure-greater net welfare loss compared to the free market solution
Factors that effect the use of the NHS-increase in old age population-increase in obesity and related ailments<...

JC
Answered by Jaya C. Economics tutor
1799 Views

In Othello, why does Shakespeare use light and dark imagery?

Othello is a play of contrasts. Shakespeare contrasts Desdemona's purity with the evil of Iago; the innocence of Desdemona with the cynicism of Emilia; Othello's honour with the falsity of Iago; Othello's...

LW
31453 Views

Differentiate xe^2

Use product rule. d(uv)/dx = u dv/dx +v du/dxu=x du/dx=1v=e^x dv/dx=e^x
d(xe^x)/dx = xe^x + e^x.1 = e^x(x+1)

GB
Answered by George B. Maths tutor
4759 Views

What are the aims of social conservatives, and to what extent have they been achieved? (January 2013)

Social Conservatism ideology is very prevalent in the USA, especially amongst conservatives and Republicans. Social Conservatism is based around the upholding of traditional values and, in politics, socia...

SP
Answered by Sid P. Politics tutor
2502 Views

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