Monday, 28 July 2014

Think 2

Group answer : 

My answer : When you come out of the swimming pool, water droplets on your body gain thermal energy from your body and evaporates into the surrounding, thus, you would lose thermal energy and the molecules in your body would move slower due to a cooler temperature and hence, you would feel cold and shiver as there was a sudden drop in temperature instead of a gradual decrease.

Think 1

Group answer : Heat means higher temperature which leads to faster movement of particles of kinetic energy in the body. When you enter an air-conditioned room, you will feel lose heat and the kinetic energy in your particles will slow down, thus feeling cold. The heat will be transferred to the air-conditioned room.

My answer : After work on a hot day, you would feel hotter than usual as thermal energy causes faster movement of the molecules in your body. However, when you enter an air-conditioned room after that! your body would come in contact with molecules which are moving in a slower movement as it is colder inside which slows down the molecules. Thus, thermal energy would be transferred to the room and you would lose thermal energy, thus feeling cold.