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Define relative atomic mass.

Relative atomic mass is the mass of one atom of an element compared to 1/12 of the mass of an atom of carbon-12.
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Answered by Colleen S. • Chemistry tutor
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How to correctly answer "To what extent" questions?

The most significant difference between GCSE and A-level history is the amount of emphasis markers place on analysis, interpretation and evaluation. For example, if we use the question “To what extent was th...
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Answered by Colm H. • History tutor
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What fractions are equivalent to 1/4?

3/12, 2/8. To identify fractions which are equivalent to one another, you need to identify the common multiple of both the denominator and numerator and then simplify. When a fraction is equivalent to one an...
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Answered by Konstantin N. • Maths tutor
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Solve algebraically: 6a + b = 16 ..... 5a - 2b = 19

first equation: 6a + b = 16 second equation: 5a - 2b = 19 from 2 times first equation + second equation 17a = 51 meaning a = 3 .... from the first equation 6(3) + b = 16 therefore b = - 2
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Answered by Benjamin C. • Maths tutor
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a boat is in a still lake with its anchor up in the boat, it then drops its anchor till it hits the bottom of the lake. Is the water level highest a) when the anchor is in the water. b) when the anchor is in the boat. c) it makes no difference.

b) when the anchor is in the lake it displaces the amount of water equivallent to the volume of the anchor, when the anchor is in the boat it displaces the amount of water equivallent to the anchors mass. Be...
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Answered by Benjamin C. • PAT tutor
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