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These questions from my own experience were some of the hardest in the GCSE maths course and need careful explaining in order to understand them properly and be able to complete them independently.These q...

Mirrors can be made much larger than lenses (meters compared to around 1m max). Mirrors do not produce chromatic aberration. Mirror glass does not need to be as high quality as lens glass. Mirrors produce...

E = hfE = energyh = planck's constant = 6.63 x 10^-34f = wave frequency
c = fλf = c/λ
E = hc/λ
c = 3.0 x 10⁸ The speed of light which in this case is the speed of the ...

Graphene has strong covalent bonds between the carbon molecules giving graphene properties such as a high melting point and making it very strong.Due to the delocalised electrons that are free to move acr...

Insulin is made in the beta cells of the pancreas. They act on receptors on the target cells. This controls the uptake of glucose in the target cells by regulating the inclusion of channel proteins on the...