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The curve C has the equation (x^2)+4xy-8(y^2)+27=0. Find dy/dx in terms of x and y.

dy/dx= (x+2y)/(8y-2x)

4545 Views

Compare how two texts have addressed the issue of love.

I would suggest that the student looks at 3 areas, form, structure and language. In terms of form, is it a poem, and if so, does it follow a particular rhyme and rhythm? Is it an extract from the novel, a...

Answered by Holly G. • English Literature tutor

4471 Views

To what extent do you agree with the view that Frankenstein by Mary Shelley is a total condemnation of transgression?

The novel was proclaimed to be a 'cautionary tale' against Enlightenment desires for knowledge, including the scientific pursuit of new technologies. Frankenstein's scientific endeavours transgress the bo...

Answered by Megan R. • English Literature tutor

10026 Views

You have 3.51g of hydrated zinc sulphate. You heat up the zinc sulphate until all the water has evaporated from it. The weight after heating is 1.97g. Find how many H2O molecules per zinc sulphate molecule there are in the hydrated form of it.

Write down the equation: ZnSO4xH2O --> ZnSO4 + xH2O 2. Calculate the masses: 3.51g --> 1.97g + 1.54g 3. Calculate the number of moles, using the molar mass of water and zinc sulphate: 1.97g = ...

Answered by Olivier S. • Chemistry tutor

22478 Views

Why do we have to use radians instead of degrees?

Radians are used a lot in A level maths because at higher levels, they allow for simplification of trigonometric functions. For example, when using radians, it can be said that:

Sin(angle) ≈ angle ...

Answered by Jamie S. • Maths tutor

8527 Views