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Group 1 metals all have one outer electron, which is responisble for their properties. As you go down the group:

• the metals become more reactive. This is due to the increased number of electr...

Firstly you have a change away from optimum conditions, for instance a decrease in internal body temperature, which is detected by a receptor. The receptor relays this infromation down the communication p...

Initially, there is only one force acting on the skydiver, which is their weight. F=ma therefore mg=ma. The m's cancel and the skydiver falls with acceleration g. However as soon as they have a downwards ...

First of all, the thing to realise is that both of these theories have the same result in the end. They both mean that how our life ends up is decided by forces other than ourselves. But the difference be...

y=ln([2x-1/2x=1]^1/2)- can be written as y= [0.5ln(2x-1)]-[0.5ln(2x+1)] due to laws of logs. Take first term -- (0.5ln(2x-1)) and substitute 2x-1 for u. so u=2x-1 and y=0.5lnu Now dy/du=1/2u and du/dx=2. ...