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What is meant by the conservation of energy?

Energy cannot be destroyed or created - it is always transferred between different objects in different forms. Hence, energy is 'conserved'. The most basic example is dropping a stationary rubber ball from a...
JH
Answered by Jonathan H. • Physics tutor
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Explain how the historical backdrop of Steinbeck's 'Of Mice and Men' affects the novels' discourse

Seeing as this is arguably an essay or short essay topic the answer given below will be a brief summation of what a student may want to include in their answers in regards to this specific text as well as ho...
HC
3694 Views

Solve the following simultaneous equations: x^2 + 2y = 9, y = x + 3

When solving simultaneous equations, there are two methods: substitution and elimination. For this question, as one of the equations is a quadratic, the substitution method has to be used. The second equatio...
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Answered by Chloe L. • Maths tutor
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Factorise 6x^2 - 12x

common factor is 6x therefore it is 6x(x-2)
HH
Answered by Huy H. • Maths tutor
7478 Views

express z(2+i)=(1+2i)^2 in the form z=x+iy

rearrange gives z = [(1+2i)^2]/(2+i)expanding (1+2i)^2 gives 4i-3 therefore this becomes (4i-3)/2+i multiply that by the conjugate (2-i)/(2-i) to give (11i-2)/5therefore z= -2/5 + 11i/5
HH
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