Y9 Density + pressure Flashcards
1
Q
Formula for pressure
A
Force/area
2
Q
Measurement for pressure
A
Pa
Pascals, N/metres squared
3
Q
Measurement for force
A
Newtons
4
Q
Formula for density
A
kg/ metres cubed or g/cm cubed
5
Q
Sign for density
A
p
6
Q
How to find volume in irregular objects
A
pour water into a eureka can, place the object into a eureka can, with a measuring cylinder/beaker underneath the hose where the water is then measured. The system is called displacement.
7
Q
How do gases exert pressure?
A
When gases move around, they bump into objects. When they bump into objects, they exert pressure due to newton’s third law.
8
Q
Pressure in liquids
A
Pressure is caused by the weight above.
9
Q
How to calculate pressure difference
A
Pressure difference = height X density X gravitational force field
