Cards in this guide (13)
A helium balloon rises in the air because it is less dense than oxygen
Yes, helium is less dense than the air.
What causes friction between two seemingly smooth surfaces
Tiny collisions on the surfaces, called microwelds, cause
friction.
Properties of matter are typically broken into two categories physical and
What factors determines the strength of the frictional force between two surfaces
how hard the surfaces push to gether the types of surfaces
involved
Do both gases and exert a buoyant force
Yes. Gases and liquids both exert a buoyant force.
The type of motion that's present in circular or curved pathways is called motion
If an object floats the volume of the displaced water is equal to the volume of the whole object
Since an object moving in uniform circular motion keeps a constant speed there is no force necessary to keep it in motion
To calculate the density of a substance what two properties do you need to know
In a collision a vehicle that rebounds off the object it trikes experiences less force than if it crumples assuming the time is the same in both situations
Liquids that do not mix form into layers when they have different densities true or false
The of any amount of a solid liquid or gas relative to its volume is called it's density
Which of the following has the lowest density