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The "si" clause in French can use a few different tenses depending on what kind of hypothesis you want to talk about. There are three main uses that each use a different combination of tenses. <...

In any metal, there are free surface electrons. For these electrons to escape from the surface of a metal, they require a specific amount of energy, called the 'Work Function'. There are many sources of t...

When the string is plucked, waves will travel from the point where it was plucked to the fixed ends, which cannot move and so must be nodes. The waves will reflect, and the superposition of the reflected ...

Calcium ions enter the presynaptic terminal via voltage gated calcium channels, once the presynaptic terminal is depolarised by an action potential.Calcium ions stimulate vesicles to fuse with the presyna...

^A_Z X --> ^{A - 4}_{z - 2}Y + ⁴₂α
During alpha-decay, the nuclus emits an alpha particle which consists of two protons and two neut...