articles on Separating and Mixing Pareve With Milk or Meat

Why do I need to wait six hours?
Somebody Cooks together potatoes and meat, and eats only the potatoes. Why does he need to wait six hours?

changing milk cutlery to meat cutlery
Can I Kasher my milk cutlery so I can use them for meat cutlery or vice-versa Kasher my meat cutlery and then use them for milk?

Kashering Corelle Plates
What is the way to Kasher a Corelle Plate?
