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Explain the process of sand casting

Place the mould(s) within the drag & fill with casting sand (compact well) Turn the drag over & place the cope over the drag. Place sprue pins on the bottom of the mould(s) and fill the cope with san...
JH
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v^2=u^2 + 2as u=12 a=-3 s = 18 Find v

First we can plug in the values we already know into the equation we would get: V 2 = 12 2 + (2 x -3 x 18) then we would seperate the two multiplications on the right hand side12 x 12 = 144 2 x -3 x 18 = -6 ...
OB
Answered by Oscar B. • Maths tutor
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Question from an Edexcel GCSE Maths Higher Paper (Nov 2018) - Solve the simultaneous equations: 5x + y = 21, x-3y = 9 (3 marks)

So since there are two unknowns in this question, its slightly more difficult than a normal equation where we only have 1 x or y that we're trying to work out. There are two ways to deal with this type of si...
Answered by • Maths tutor
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Harry mixes white paint and blue paint in the ratio 2:5. He makes a total of 21 litres of paint. How much more blue paint does he need to add to the mixture so that the ratio of white paint to blue paint becomes 1:4?

W:B = 2:5 Total of 21 litres of paint. We want a ratio of W:B = 1:4 = 2:8 Therefore we must add 3 parts of blue paint 2 + 5 = 7 parts total7 parts = 21L1 part = 3L3 parts = 9L Therefore must add 9L of blue p...
JB
Answered by James B. • Maths tutor
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Name and explain the formation of the river landform labelled A in Resource 1. (Waterfall Formation - 6 marks)

A waterfall, labelled A in resource 1, normally forms in the upper valley of rivers where alternating bands of hard and soft rock occur along the river bed. The bands of softer rock are eroded at a faster ra...
JE
Answered by Joshua E. • Geography tutor
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