Both UK and Australian mains voltage / frequency are nominally 230v and 50Hz, so appliances built to UK standard will work in Australia if fitted with the appropriate plug.
Mains electricity in the USA is 120v and 60Hz, so few appliances built to USA standard will work in Australia without a transformer.
This link is a useful guide to mains electricity in different countries.
Mains electricity in the USA is 120v and 60Hz, so few appliances built to USA standard will work in Australia without a transformer.
This link is a useful guide to mains electricity in different countries.