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The heart consists of four chambers, two atria and two ventricle. The conduction system of the heart mediates synchronised contraction of the chambers to allow the heart to effectively pump blood. The con...

Stage 1 -Bonding 1a) Each C has three (covalent) bonds 1b) Spare electrons (in a p orbital) overlap (to form a pi cloud) 1c) delocalisation
Stage 2 -Shape 2a) Planar 2b) Hexagon/6 carbon ring/120o b...

En mis últimas vacaciones, fui a españa con mi familia. Anteayer, volvimos del piso en el que nos alojabamos. Todos los días nos rel...

The most effective physiological aid for a dancer would be cooling aids, these are legal and allow for reduced core body temperature, decreased sweating, dehydration and early fatigue, decreased pain and ...

Solution: Let us consider the function f(k) = k² - k -12. Firstly, we want to find out the roots of this function. We calculate the discriminant: Δ = b² – 4ac = 49 hence we ...