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A note was played on a a keyboard. The frequency of the note was 440 Hz. (a) What does a frequency of 440 Hz mean? (b) The sound waves produced by the keyboard travel at a speed of 340 m/s. Calculate the wavelength of the note.

(a) A frequency of 440 Hz means that a single trough and peak of the sound wave oscillates 440 times per second or equally that 440 sound waves are produced by the keyboard per second (This is because ...

Answered by Ifan W. • Physics tutor

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How do you solve the simultaneous equations 3x + 4y = 5 and 2x – 3y = 9

We label each equation

3x + 4y = 5 (1)

2x – 3y = 9 (2)

We now want to get rid of one of the variables (x or y). Lets get rid of x:

Answered by Sahiti S. • Maths tutor

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How do you find the nth term formula for a sequence with non-constant difference?

Take the sequence;

9, 12, 19, 30, ...

(1) The first step is always to look at difference between the terms;

9, 12, 19,...

Answered by Richard S. • Maths tutor

208974 Views

Using Context

Appropriate use of context is key in making your essay more two dimensional and mature. Context does not simply mean the historical background behind the text you're studying, but the literary environm...

Answered by Amelia P. • English Literature tutor

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