Science Class 18/5 - Explode/Implode

Implode & Explode















No Water + Cold
Inside and outside forces acting on bottle are equal. -> normal shape. 















With HOT water + Lid on
Hot. Force acting on the inside is greater than the force acting on the outside -> bottle bulges














No water + Lid on + Cooled
Hot water emptied. Lid on. Cool under cold water. Bottle collapsed. Force acting on outside of bottle is greater than force acting inside? Why? 

Air pressure (a force) is greater. Air particles have more energy and oush harder against bottle. 

QUESTIONS!

1. If 2 people are equal weight where do they need to sit on the see saw to balance.
They can sit anywhere on the seesaw as long as they are both at equal distance from the middle. 

2. If 1 person is heavier where does this person need to sit to balance? 
The heavier person will need to sit closer to the middle and the other person on the end. 

NOTE : Each person's weight is a force pushing down on the seesaw