a) calculate the weight of the oil.
b) i) state what this shows about the density of brass
ii) explain how attaching the key to a piece of wood could prevent the key from sinking
![a calculate the weight of the oil b i state what this shows about the density of brass ii explain how attaching the key to a piece of wood could prevent the key class=](https://us-static.z-dn.net/files/d88/bab8d1e94c90583e3846ba94c351eafb.png)