Welcome to the Science Quiz 85

Which material has a constant relative permeability? Which material has a constant relative permeability? Learn and enjoy science learning with educational toys. The world revolves around Science; find out what you know. Quizzing is the best way to learn about the world we live in. Try quizzing at least 1 hour every time you meet your friends.Email them a quiz every now and then and when you chat with them next time, ask them a tricky question.