Top answers

Diamond is very hard because:

It is a giant covalent structure.
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Answered by Rifat M. • Chemistry tutor
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A line has equation y = 3x + 4, write down the gradient of the line.

gradient = 3
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Answered by Rifat M. • Maths tutor
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What is the name given to waves where the oscillations are in the same direction as the wave energy?

When the oscillations of the waves are parallel to the wave energy, we call the wave longitudinal. An example of a longitudinal wave could be s ound waves.
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Answered by Rifat M. • Physics tutor
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Why are subsidies a more efficient way of reducing prices than price ceilings are?

To begin with, the main difference between subsidies and price ceilings is that subsidies move the market equilibrium as they shift supply outwards (show on a diagram), which occurs because producers now fac...
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Answered by Anna Z. • Economics tutor
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How to convert a recurring decimal into fraction

Fristly we need to define recurring decimal as a rational number that does not terminate. Example 1, 0.444444444... Example 2, 0.123123123... A fraction is a number in which the numerator is divided by the d...
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Answered by Bernice L. • Maths tutor
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