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Allopatric speciation:

New species appear when one interbreeding population is split into two reproductively isolated populations, which then evolve to become separate species. Thi...

Composite cone volcanoes are made out of alternate layers of magma and ash deposits whereas shiled volcanoes consist mainly of magma deposits only.

composite cone volcanoes are also steep...

To work out the gradient of a function f(x), we need to differentiate it with respect to x, to give us f'(x). If x = a at a point, then the gradient of f(x) at that point is f'(a) (substitute a in plac...

Let us denote sin(nx) = u(x), where u is a function of x. The equation is now therefore f(x) =(u(x))^n.

For simplicity, we will write that as f(x) = u^n

By the chain rule, w...

The equation for the reaction is; 2H₂ +O₂ = 2H₂O

From the equation it can be seen that 2 moles of hydrogen reacts with 1 mole of oxygen to produce 2 moles...