Step inside the strange world of a superfluid, a liquid that can flow endlessly without friction, defying the common-sense ...

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Trigonometric graphs can be sketched when you know the amplitude, period, phase and maximum and minimum turning points. Learn about graphs of trigonometric functions in this National 5 Maths guide.

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Discover what step costs are, why they matter in business, and explore examples showing how these costs increase at specific levels of activity for better financial planning.