Explain why this happens: "If you put your hand in a beaker of water and decided to open & close your fist, the water level in the beaker should rise as you sent those fluid signals to your hands." ----- Nội dung dịch tự động từ ảnh ----- 2. Explain why this happens: "If you put your hand in a beaker of water and decided to open & close your fist, the water level in the beaker should rise as you sent those fluid signals to your hands." (paragraph 1, page 3) *