Status: Looking for a guide ... Status: Connected to guide: JohnE JohnE: Welcome to ChaCha! JohnE: HI You: hello doing physics presentation... can you help me? which one is heavier one kilogram of steel or air? JohnE: I think this is a trick question..... JohnE: Is the air dry? You: yes... You: i dont have to know the humidity... JohnE: then #1 any weight of any matl. is always the same... JohnE: and #2 I dont think air weighs anything. JohnE: Now... JohnE: 1 ton of gold weighs more than 1 ton of steel... JohnE: because... JohnE: gold is measured in troy weight. JohnE: thats sort of a trick question too You: ok. so what should i write to my presentation. steel or air, if air is dry? JohnE: Let me look up the weight of air... JohnE: stand by please... You: ok..