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When water freezes into ice, the H₂O molecules form Hydrogen bonds between each other and arrange themselves into an open lattice structure. This causes the molecules in ice to be further apart...

This question should be answered with reference to a number of factors, which should be laid out and clearly signposted in the introduction. The key factors to discuss are:

1. Protestant Uls...

Firstly, the intercostal muscles contract. This causes the ribcage to move upwards and outwards. The diaphragm also contracts. This all has the combined effect of increasing the volume of the lungs. As a ...

18*24=432    432/2= 216    Therefore area of text must equal 216. And the margin must be the same width all the way round. Therefore, (24-x)(18-x)=216, 432-24x-18x+x²=216, 216-42x+x²...

Sin duda, hay muchos peligros de fumar para la salud. Uno de los peores peligros es el riesgo del cáncer de los pulmones. Fumar cigarillos produce un riesgo mayor de enfermedad de los pulmones y aumeta la...