physics 1 Flashcards
1
Q
solid density
A
- very high density
- particles packed closely together
- have a lot of mass for their volume
2
Q
liquid density
A
- high density
- particles are close together
- have a lot of mass for their volume
3
Q
gas density
A
- low density
- particles are very far apart
- only have a small mass for their volume
4
Q
why is polystyrene a solid but has a low density
A
they have a very open structure and is full of air spaces. It has a small mass for its volume
5
Q
Equation for Change in Momentum
A
change in momentum=force × time=impulse
6
Q
equation for momentum
A
p = mv
p = momentum
m = mass
v = velocity
momentum = mass x velocity
7
Q
A
