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what is the site of gas exchange in the lungs

the alveoli (air sacs that follow from the bronchioles)

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what are isotopes and why do they have the same properties?

Isotopes are atoms of the same element that have the same proton number but different nucleon number. TRAIN OF THOUGHT --- Isotopes have the s...

Answered by Sito E. • Chemistry tutor

1884 Views

Solve x^(-1/4) = 0.2

Get both sides in similar forms to make it easier to solve.1/x^1/4 = 1/5x^1/4 = 5x = 5⁴ = 625

Answered by Salma E. • Further Mathematics tutor

4312 Views

A curve has equation y = ax^2 + 3x, when x= -1, the gradient of the curve is -5. Work out the value of a.

The gradient of a curve at a point is given by dy/dxDifferentiate the equationplug in the valuesdy/dx = 2ax + 3x = -1, dy/dx = -5-5 = 2a*-1 + 38 = 2aa = 4

Answered by Salma E. • Further Mathematics tutor

5017 Views

How should I approach an essay title that I find particularly challenging.

The first thing to remember with essay titles is that the question will most likely make a statement and ask you to what extent you agree or disagree with it. For example; "the ideals of freedom and ...

Answered by Rebecca C. • English tutor

1854 Views