Experiments

• A piece of ice is placed in a boiling tube full of water, weighted down by a marble. When top of the tube is heated, the ice doesn't melt as convection currents carry heat upwards.








• Rod, wood in the middle and metal at both corners. However, only the paper at the wood portion scorched.
Reason: METAL IS A GD CONDUCTOR OF HEAT.


• Put a paper cup over the Bunsen burner / flame-----notice the paper cup would burn within a few seconds, however if you put water into the cup, and put over the flame, the paper cup would not burn, instead, the water inside would boil. But why water not the paper cup? The paper is thin and therefore heat is conducted quickly to the water in the paper cup.




• The tiled floor and the woolen rag , even though, they are of the same temperature, the tiled floor feels cold, while the woolen rag is warm, its because, the tile is a better thermal conductor than the woolen rag, thus, it conducted heat at a much rapid rate. That’s the reason why you would turn your feet to the side, so that there is lesser area of contact, thus less heat energy would be conducted away.




• Meat w/o bone
Meat w bone
Which one would cook faster? Both meat are the same, except that one has bone while the other does not have. Meat with bone would cook faster, as bone is a good thermal conductor. So next time, try cooking your meat with the bone still in place!



• If you were to have to serve your guests with baked potato quickly, put metal spoons/forks through the potato at both sides, you will notice that the potato will bake much faster, because the metal spoon/ fork, conduct the heat away from it quickly, the heat energy is then transferred to the potato, thus the potato bake at a faster rate.