The force of buoyancy on an object is equal to the weight of the fluid displaced by that object. For example, if you submerge an empty gallon milk jug in a bathtub, it displaces a gallon of water. The water in the bathtub then pushes up on the jug with a little more than 8 pounds...
Kippers are cold-smoked herring fish, and they are traditionally served as a protein at breakfast in the UK. You can buy them fresh or frozen from most supermarkets, though in the US, you're more likely to find them in a can. Canned...