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GCSE

What is the difference between reflection, refraction and diffraction?

These are all properties of waves and their definitions are useful to remember for exams. It can also be helpful to draw diagrams of each to help you to remember the difference. On the diagram it is us...

AK
Answered by Anna K. Physics tutor
12618 Views

Expand and simplify 3(2x + 5) – 2(x – 4)

Firstly, to expand an equation like this, you must multiply the brackets by the number outside of the brackets. Make sure that you multiply every number inside the bracket by the number directly outsid...

AK
Answered by Anna K. Maths tutor
79503 Views

What is tonality?

Tonality describes what key a piece is in or what tonal relationships are used. When asked to talk about tonality you should discuss whether the key is major or minor and the different modulations used...

AH
Answered by Alice H. Music tutor
11650 Views

Solve the simultaneous equations 3x + 4y = 17 and 4x + y = 14

Eq1: 3x + 4y = 17

Eq2: 4x + y = 14

Eq2 x 4: 16x + 4y = 56

Subtract Eq1 from this to isolate x: 16x + 4y - 3x - 4y = 56 - 17

Simplify: 13x = 39

DH
Answered by David H. Maths tutor
9147 Views

Why is the heart known as a double pump?

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