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There is a structure of positively charged metal ions arranged in a regular pattern. Between these metal ions lie a sea of delocalised electrons which have been delocalised from the metal atoms to form th...

At the minimum point the gradient is zero so dy/dx=0. To find dy/dx, first expand out the brackets so y=2x^2 - 12x + 10. Using differentiation dy/dx=4x - 12. At the minimum 4x-12=0 so 4x=12 therefore x=3....

There is variation naturally present between members of a species. These variations can prove advantagous, thus making an individual in a species better adapted for survival. For example, giraffes with a ...

we can know there are 3 terms in this polynomial. The basic rule to simplify it is to combine the similar terms. The “x” exists both in the “8x”and the “6x” , which means they are similar. Therefore we ca...

Je l'ai acheté pour une bouchée de pain - 'mouthful of bread' / fig. 'it didn't cost much'
Faire la grasse matinée - 'fat morning' / fig. 'to sleep in / lie in'
Tomber dans le panneau - 'to fall...