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Write (3 + 2√5)/(7 + 3√5) in the form a + b√5

First multiply top and bottom by conjugate of denominator, (7-3√5), and expand(3 + 2√5)(7 - 3√5)/(7 + 3√5)(7 - 3√5)(21 + 14√5 - 9√5 - 30)/(49 + 3√5 - 3√5 - 45)Simplify top and botton(-9 + 5√5)/4Write in requ...
BA
Answered by Beth A. • Maths tutor
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In the Photoelectric Effect, what is mean by 'threshold frequency' and how does the magnitude a photons frequency effect the electron it is absorbed by?

The threshold frequency is the minimum frequency a photon can be and still just overcome the work function (Φ) of a particular material. The threshold frequency is directly proportional to the work function ...
JH
Answered by Josh H. • Physics tutor
15447 Views

How does one go about a product analysis?

A product analysis takes into account who the product is for, both client and user if separate, and who is designing and making the product.It also takes into account;ShapeFormColour & TextureDecorationI...
BB
2451 Views

Can you aid me in my D&T A-Level Coursework?

Of course, allow me to read through it or walk me through it and I will aid you in it and advise on appropriate methods where possible
BB
2582 Views

I often find it difficult to structure 'compare and contrast' style questions. How do I do this?

One of the problems with questions like this, is that there is so much to talk about. Many students can fall into the trap of waffling and writing too much about a single point. Using PEE paragraphs is one s...
CR
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