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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 decreasi...

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 valoris...

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 'b...

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 t...

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, ...