A guy who is a friend of a friend has been mining all summer and is headed south. He says he is out of cash and needs to buy a plane ticket in a hurry because of a family emergency. He has a gold nugget that weighs 0.980N (100g). He weighs it for you and says he will sell it to you for $800 cash, a great deal, but he is in a bad way. "You help me," he says, "and you get a great deal!" You stick the nugget in a glass of water using the same scale and measure 0.870N. Then he says it may have a little copper mixed in.

F1 = 0.980N

F2 = 0.892N

Part A:

What is the density of the nugget?

Part B:

Should you buy it?