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A strong A-Level music essay should mainly contain the identification and analysis of some of the key musical features within the given piece, and should also provide some information about the musical pe...
Acids, by definition, are proton donors, so will donate a H+ ion to a base. Examples of acids may be HCl or ethanoic/acetic acid (a.k.a. vinegar).
Base...
Using the knowledge of a2 = b2 + c2 - 2bcCos(A)
Rearrange to aquire Cos(A) = (b2 + c2 - a2)/2bc
Then input ...
d/dx(4x3 + 2x) = d/dx (4x3) + d/dx(2x)
= 4(3x2) + x
= 12x2 + x
Any chemical that dissociates to give an H+ ion is classified as an acid. There are stong and weak acids but at GCSE you only need to know some key reactions which apply to both weak and st...
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