Density And Pressure Flashcards
Density =
Mass / Volume
Units for Density :
g/cm3 or kg/m3
Pressure =
Force /Area
Units for Pressure :
Pa (N/m2) or N/cm2
Pressure in a fluid increase ..
With depth
Pressure in a fluid is not ….
Dependent on its surface area
Pressure = pgh
Pressure = density (Kg/m3) x gravity (m/2) x height (metres from surface)
An experiment to calculate the density or a regular shaped block
1) Find the mass of the solid using a top balance
2) Find the volume of the solid using the height, length and width of the object. Multiply these three figures together to find the volume of the object
3) Use the formula density = mass / volume
An experiment to calculate the density or an irregular shaped block
1) Find the mass of a solid using a to balance
2) Find the volume by pouring a known amount of water into cylinder
3) Drop object gently into measuring cylinder
4) Measure the difference in level of water
5) Use the formula density = mass / volume
The greater the force applied over a smaller surface area …
the higher the pressure
N.B - The depth/height MUST be measured in …
m NOT Km
Voltage =
amount of energy transferred per coulomb of charge
1 volt =
1 joule per coulomb
Potential Difference (V) =
energy transferred (J) / charge (C)
Current =
the rate of flow of charge
