Physics exam Flashcards
What are the 3 states of matter?
Solids,liquids,gases
What can solids do?
Hold their shape
What do liquids do?
They can flow
What can gas do?
Gas are spread out particles
What keeps solids together?
Bonds
How do I change a solid into gas?
We can melt them which turns into liquids then we evaporate it which turns into a gas.
How do we change gas into solid?
We condense it turning it into a liquid then we can change it into a solid.
What’s the process of melting?
The process of melting the heat energy breaks the bonds into between the particles.
What changes in melting a solid?
The cold liquid moves, slowly then the hot liquids and gas move faster after evaporating the particles get bumped out of liquid.
what’s the difference between cold solid and hot?
Cold solids are joint together as hot solids expand
What’s density?
Density is when you measure mass(g) over volume(cm3)
How do we measure mass?
Mass by using scales
How do we measure volume?
length, width , height
Write a definitions about an object floating?
The density is less than the density of the liquid it’s floating on.
Why will an object float in water but not in oil?
Because it about 1 less dense than water.
What is the density of water for it to float?
1g/cm3
What’s the force that keeps an object floating?
Up thrust
what’s the force pushing the object down?
Weight
definition of cold particles
slower
definition of faster particles
hits the walls harder more often
definition of smaller volume
less pressure fewer particles
Which pressure is greater?
inside
Why does pressure increase when you go deeper into water?
The deeper you go the more pressure is on you
if I throw a deodorant can in a fire what would happen?
Particles gain energy from heat moving faster colliding with the walls more often and harder until the pressure on the inside can’t handle it so it explodes?
drag definition
If a drag has a larger surface area it collides with the movement of air particles The force slows it down?
What does an Upthrust do?
Provides a little force even if it’s not floating
