Potential energy can be calculated by the formula Pe=mgh. Plug in your values:
Pe=mgh
Pe=(6 kg)(9.8m/s^2)(100 m)
Pe=5880 kg x m^2/s^2, or 5880 Joules
Koalas are not crusty, but their fur is very coarse, like wool.
Hope this helps.
It depends if it occurs naturally it has oxidation number of 0
but when it react with other element it has an oxidation number of -1