[trigger (OP)]

hi all, what energy transfers are used to operate a wind-up radio

thanx  trigger

[lyner]

Homework assignments cost extra, trigger.

[trigger (OP)]

sorry what do you mean cost extra?

[Chemistry4me]

Money???

[lyner]

Your question looks as though it was set as an assignment. That should involve some thinking on your part, not on my part.
You could start with chemical energy in your food . . . . .