What's heavier a kilogram of steel or a kilogram of feathers?
user
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.
assistant
But feathers are lighter than steel
user
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?
assistant