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How do I use Pythagorus' Theorum?

Pythagorus' Theorum is used to calculate the lengths of the sides of a right angled triange, and is written mathematically as follows: a 2 + b 2 = c 2 The letters (a, b and c) each stand for one of the three...
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Answered by Narissa P. • Maths tutor
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What is the difference between slow twitch and fast twitch muscle fibres?

Slow oxidative fibres are designed for aerobic endurance exercise. They use oxygen to work at a moderate rate over a long period. They are red due to the high concentration of blood vessels which deliver a r...
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What can I say about the roots of a quadratic equation without actually calculating them?

If a quadratic equation is of the form ax 2 +bx+c, calculate D (Discriminant) whose value is b 2 -4ac. If the value of D is negative, the equation has imaginary roots. If the value of D is positive, the equa...
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Answered by Swapnil S. • Maths tutor
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Why are elements of group 0 chemically inert?

Elements of group 0 are called noble gases. These elements have stable arrangements of electrons in their outermost shell. The chemical reactivity of a group highly depends on the number of electrons in the ...
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Answered by Swapnil S. • Chemistry tutor
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What is a critical angle and when does total internal reflection take place?

When a ray of light travels from a denser medium to a rarer medium it bends away from the normal. It the angle of incidence is too large, the angle of refraction will be very large as well (It can be proved ...
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Answered by Swapnil S. • Physics tutor
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