Steelyard
A steelyard. Put an unknown on the pan, then slide the 20 g and 1 g poises along the arm until it balances; their places on the arm are the reading. The panel beside it takes a guess at each mystery weight.
What does each ? weigh?
A steelyard. Put an unknown on the pan, then slide the 20 g and 1 g poises along the arm until it balances; their places on the arm are the reading. The panel beside it takes a guess at each mystery weight.
What does each ? weigh?