P1.3.5 - Floating and Sinking Flashcards
1
Q
If you are floating, what force is acting upon you?
A
Upthrust from the water
2
Q
If you are floating, which overall is stronger - your weight or the water upthrust?
A
Water upthrust
3
Q
If you are sinking, which overall is stronger - your weight or the water upthrust?
A
Your weight
4
Q
What is the equation for checking if an object can float?
A
(Pa at bottom * Area at bottom) - (Pa at top * Area at top) = Weight
5
Q
How do submarines sink and float on command?
A
They fill the tanks on the side with water to sink. In order to float, they fill the tanks full of water with compressed air to help them float.
6
Q
How do fish change sea levels so easily?
A
They vary the amount of gas which is in their swim bladder
