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Many factors caused the outbreak of the First World War in the summer 1914, such that historians cannot agree on a single prime cause. Despite this, the key factors can be identified as the long-term crea...

45 femtometers to two significant figures

Differentiate to find dy/dx = 3x + 2;at point (-1,0) dy/dx = -1substitute in to y = mx + c, noting m = -1 and the line passes through (-1,0) yields c = -1y = -x - 1, simple to sketch this line.curve sketc...

Introduction:Larkin and Duffy are often described as "gloomy poets" incapable of transforming a sense of loss into something positive. 'Talking in Bed' and 'Mean Time' explore the concept of los...

When factorising isn't working, we can try using the quadratic formula. First, we need our quadratic equation and find a,b and c - the coefficients of x and the constant. Now, we can wri...