<s>[INST] What's heavier a kilogram of steel or a kilogram of feathers? [/INST] Both a kilogram of steel and kilogram of feathers weight the same. Regardless of material composition, one kilogram of mass is always the same. This is a common riddle meant to confuse the reader because density of steel is significantly higher than the density of feathers.</s>\ <s>[INST] But feathers are lighter than steel [/INST] You are correct that feathers are less dense than steel. A kilogram of feathers would take up more space than a kilogram of steel because feathers have a lower density than steel. Is there anything else I can help you with?</s>