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Describe the process of ventilation in humans. (4 marks)

During inhalation, the intercostal muscles contract causing the rib cage to move up and out. The diaphragm also contracts and flattens. This causes the thorax to expand, increasing the volume and decreasing ...
EC
Answered by Ella C. • Biology tutor
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Qu'est-ce qu'on pourrait faire pour décourager les jeunes de fumer?

On sait que beaucoup des jeunes commencent de fumer pour renforcer leur image "cool". Le gouvernement devrait interdire les annonces et les pubs qui démontrent les gens qui fument ou qui valorisent...
KF
Answered by Kitty F. • French tutor
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Use integration by parts to find ∫ (x^2)sin(x) dx. (A good example of having to use the by parts formula twice.)

Before we blindly start using the integration by parts formula, we can see that no matter how many times we differentiate or integrate sin(x) we will still have a trigonometric function. The aim of the 'by p...
JC
Answered by Jack C. • Maths tutor
7422 Views

Give a broad critical appraisal of the work of Willem de Kooning

The American Abstract Expressionist Willem de Kooning (1904-1997) was born in Rotterdam, in the Netherlands. He was raised by a domineering mother who worked as a bartender. De Kooning was unusual among the ...
AH
3901 Views

Explain Le Chatelier's Principle

In a chemical equilibrium, the position of the equilibrium will always move to oppose any change in temperature, pressure or concentration of reactants/products. For example, if temperature is increased, the...
JC
Answered by Jacob C. • Chemistry tutor
4166 Views