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What are metrics in poetry?

Metrics refers to the rhythm of a poem. By rhythm, we mean how the words are said in natural speech. In spoken language, words are made up of syllables that are either stressed or unstressed, by which we mea...
KB
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Explain the term 'representative democracy'

Representative democracy is a method through which the public give a mandate to a political body to allow them to make decisions on behalf of the general public. This can be juxtaposed to direct democracy, w...
MB
Answered by Miles B. • Politics tutor
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State similarity and difference between the electric field lines and the gravitational field lines around an isolated positively charged metal sphere.

The lines are radial and as distance increases from the sphere the further away the lines get from each other in both. The differences are that gravitational lines are directed towards the sphere and electri...
TS
Answered by Trishi S. • Physics tutor
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Explain how the structure of mRNA differs from the structure of DNA

The structure of mRNA differs from the structure of DNA in that mRNA is a single-stranded molecule whereas DNA is a double-stranded molecule in the form of a helix. Another difference between them is that th...
MZ
Answered by Maria Z. • Biology tutor
21994 Views

Using the binomial theorem, find the coefficient of x^4*y^5 in (x-2y)^9.

The term containing x 4 y 5 will be C(9, 5) x 4 (-2y) 5 = (9!/(5!4!)) x 4 (-2) 5 y 5 The coefficient of which will be 126 -32= -4032
GH
Answered by George H. • Maths tutor
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