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((2x + 3)/(x-4)) - ((2x-8)/(2x+1)) = 1

x=0.81
AS
Answered by Amelia S. • Maths tutor
3474 Views

A 10kg cube of iron with length 5cm is resting on a table surface. Assuming the acceleration under gravity of the block is 9.81ms^(-2), what is the pressure on the table?

Pressure is given by P=F/A, where F is force and A is area. Neither are given in the question, but A is the area of the cube in contact with the table; this is the area of one face of the cube, so A=L L=0.05...
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Answered by William H. • Physics tutor
4424 Views

You are shown a diagram of a right angled triangle, with the hypotenuse labelled c and the other sides labelled a and b. If a is 7m long and c is 10m long, what is the length of b?

A simple implementation of Pythagoras' Theorem a 2 +b 2 =h 2 , and as in the question c is the hypotenuse, a 2 +b 2 =c 2 . (Side Note - in exams, the question may not specify which length is the hypotenuse -...
WH
Answered by William H. • Maths tutor
4555 Views

Explain how DNA replicates inside a cell

DNA is made up of 4 bases (Adenine, Thymine, Guanine, Cytosine) Adenine, guanine = purine 'Pure AGony' Thymine and cytosine = pyramidines Adenine pairs with thymine (2 Hydrogen bonds - '2 people know where i...
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Answered by Claire D. • Biology tutor
4005 Views

What role does the ITCZ play across different tropical climates?

Tropical Climates can essentially be split into three main categories: Equatorial, Tropical Savanna and Monsoon. Whilst each of these are hot and Equatorial/Monsoon climates are notably wet, there are distin...
GH
Answered by George H. • Geography tutor
23173 Views