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If the highest frequency a song is 10 kHz and it is encoded at 16 bits per sample what is the minimum number of bytes needed to encode the 3 minute song?

The key to this question is to remember the Nyquist rate of a signal. This is the lowest sample rate which can be used for a signal without losing valid frequencies or gaining incorrect frequencies. This is ...
DM
Answered by David M. • Physics tutor
6996 Views

Differentiate the function f(x) = x*sin(x)

This function is the product of the two functions 'x' and 'sin(x)'. Therefore we use the product rule, which says that the differential of a product of two functions is the differential of the first multipli...
DB
Answered by Dylan B. • Maths tutor
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How do I find the intersection of a line and a curve?

Say you are given the equations of both a line and a curve, for example y=x 2 +8x-1 and y=3x-7 , and asked to find where these two intersect. This just means where the two lines would cross or touch if drawn...
LM
Answered by Lauren M. • Maths tutor
142089 Views

When red light is shone on a metal, regardless of the intensity of this light, no current will flow. However if blue light is shone on this metal a current will flow. Why does this occur?

This problem can be solved by first considering the energy of a photon e = hf. ​A photon of red light lacks the sufficient energy to free an electron. However a photon of blue light has a higher frequency an...
JP
Answered by Jonathan P. • Physics tutor
6983 Views

Discuss the role of foreshadowing in Of Mice and men.

There's many instances of foreshadowing in the novella, most of the scenes point towards the tragic ending. Steinbeck frequently hints towards the climax of the novella through his use of dialogue. George in...
AC
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