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A variable cost is a cost to a business or individual which changes with respect to the amount of output whilst a fixed cost is one that will remain constant, irrespective of the amount of output by the i...

velocity (v) = frequency of the wave (f) x wavelength of wave (in metres) (λ)
50cm in metres: 50/100 = 0.5m
Therefore (v) = 680 x 0.5= 340 (m/s)

The Battle of the Somme in 1916 is known as one of the most bloody battles that Britain has participated in, with estimates that over one million soldiers had died by its conclusion in November.The primar...

Endosymbiotic theory explains the origin of eukaryotic cells. Eukaryotes (cells that contain membrane bound organelle) are believed to have evolved from prokaryotic cells (unicellular organism that lacks ...