Convert 10ergs of into Joule​

Acalorimeter uses the principle that thermal energy flows from hotter material to colder material until both reach the same

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?

An atom that has gained or lost electrons is called an _