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How does tourism impact development in lower income countries (LIC)?

Many low income countries have tropical climates which make them a desirable place for people to travel. They may also have beautiful landscapes and different ecosystems to explore. Countries such as Indones...
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Answered by Emily B. • Geography tutor
6325 Views

What is refraction?

Refraction is what occurs when light passes from one medium to another (for example, air to water) and because of the difference in the medium, the speed changes. This change in speed of light causes it to '...
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Answered by Tanika D. • Physics tutor
2694 Views

How would I know which question to pick when sitting my creative writing exam?

Read through all six very carefully. From the first read through, eliminate the scenarios and scenes which you have little to zero knowledge about, and those which you have no vague, but immediate ideas for....
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2119 Views

How does integration by parts work ad when to use it?

Integration by parts should be used when you want to integrate a function composed of two factors (we can call them 'u' and 'dv'), where it is fairly easy to derive 'u', while it is difficult or impossible t...
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Answered by Michal O. • Maths tutor
3719 Views

A circle with centre C has equation: x^2 + y^2 + 20x - 14 y + 49 = 0. Express the circle in the form (x-a)^2 +(y-b)^2=r^2. Show that the circle touches the y-axis and crosses the x-axis in two distinct points.

Firstly we rearrange the expression to the required form:x 2 + y 2 + 20x - 14y + 49 = 0 which gives (x + 10) 2 - 100 + (y - 7) 2 - 49 + 49 = 0 and so (x - (-10)) 2 + (y -7) 2 = 10 2 Hence a = -10, b = 7 and ...
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Answered by John I. • Maths tutor
8008 Views