A bucket full of water hangs from one end of a string that passes over a light pulley. The other end of the string is driven by an oscillator of constant frequency, and the fundamental mode of standing waves is observed with one loop formed between the oscillator and the pulley. Holes are poked in the bucket causing it to start leaking water. When the bucket's mass drops to 1/4 of its initial value, oscillator oscillator ??? pulley pulley water-filled I bucket (m) leaking bucket (m'=m/4) A standing wave with four loops is observed No standing waves are observed on the string A standing wave with three loops is observed A standing wave with two loops is observed