20.21 Relationship between Young’s modulus and bulk modulus

In post 20.20, we anticipated that there must be some relationship between the Young’s modulus, E (post 20.2) and the bulk modulus, B (post 20.20) of a material. The relationship is given by E = 3B(1 – 2ν)                     (1) where ν is the Poisson’s ratio (post 20.5) of the material. We shouldn’t be surprised by… Continue reading 20.21 Relationship between Young’s modulus and bulk modulus

20.16 Homeostasis 1 – controlling the body’s chemical composition

Before you read this, I suggest you read posts 17.49 and 17.50. In post 20.14, I mentioned the belief that acidic drinks could make our body fluids more acid; similarly, many people believe that eating alkaline foods will make their body fluids less acidic. To find out more about acids and alkalis, and the pH… Continue reading 20.16 Homeostasis 1 – controlling the body’s chemical composition