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How is gas exchange in a human facilitated?

The gas exchange of O2 and CO2 must occur between the air-filled alveoli of the lungs and our blood circulation running through our vessels. Near our lung alveoli lie capillaries coat the alveoli. The capill...
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Answered by Hosna S. • Biology tutor
5080 Views

Qu'est-ce que tu as fait l'été dernier ?

L'été dernier je suis allée en France à Bordeaux en famille. Nous sommes restés dans un hotel pendant 5 nuits et nous avons vu tous les sites touristiques. Mon père voulait aller à Bordeaux pour voir les châ...
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Answered by Hannah H. • French tutor
5566 Views

How do you make the future tense in French?

The first is generally used to describe things that will happen in the near future. The French near future uses the verb “aller” (to go) in the present tense + the main verb in the infinitive. For instance:‘...
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Answered by Naoise W. • French tutor
3381 Views

Describe what red shift is and why i provides evidence for the Big Bang Theory.

Red-shift is the increase in wavelength emitted from distant objects moving away from the observer, making them appear more red.The Big Bang Theory states that the universe began from a singularity which the...
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Answered by Robert D. • Physics tutor
2989 Views

The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5. Work out the area of the triangle.

So, working out the different side lengths of the triangle is going to help find the area at the end. We split the ratio up into 3s and show them as a proportion of the whole perimeter. For example, one side...
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Answered by Roberto G. • Maths tutor
9815 Views