Answer:
1. coin-sinks
2. stone-sinks
3. ring-sinks
4. apple-sinks
5. metal-sinks
6. ballpen-sinks
7. ruler-sinks
8. nail cutter-sinks
9.hair-float
9.bamboo three- float
10. boat-float
11.empty galloon-float
12. unpiled oranges-float
13. lifejacket- float
14. styrofoam-float
15. balloon-float
16. paper boat-float
17. leaf-float