Recently, I gave my opinion to a moderator on SE Movies & TV chat room and was scolded like a child. It is very frustrating to me to make a comment in the chat room and constantly be scrutanized for not being in their "club" I read a previous question "What recourse do I have if I believe a mod...

The C-14 content of an ancient piece of wood was found to have three tenths of that in living trees (indicating 70% of the C-14 had decayed). How old is that piece of wood? Please use these following formulas: 1.) ln(N/No)= -kt 2.) t1/2 = ln2/k

I humbly appreciate if you will answer these ff. questions. Can you tell whether a substance is an element or a compound based on its physical appearance? Knowing that an element cannot be broken down into simpler substances, should it react when in contact with heat? Should it ignite? If that ...