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5 Solids Liquids Gases- Part A “Units”

Syllabus Aims…

5.1 use the following units: degrees Celsius (oC), kelvin (K), joule (J), kilogram (kg), kilogram/metre3 (kg/m3), metre (m), metre2 (m2 ), metre3 (m3), metre/second (m/s), metre/second2 (m/s2), newton (N), pascal (Pa).

5.2 use the following unit: joules/kilogram degree Celsius (J/kg oC)   (Triple)

Units Defined…..

Kilogram (kg): the SI unit of mass, equivalent to the international standard kept at Sèvres near Paris (approximately 2.205 lb).

Joule (J): the SI unit of work or energy, equal to the work done by a force of one newton when its point of application moves one metre in the direction of action of the force.

Speed: the rate at which someone or something moves or operates or is able to move or operate. m/s or ms-1

Acceleration (m/s/s OR Nkg-1 OR ms-2) vehicle’s capacity to gain velocity.

Metre (m): the fundamental unit of length in the metric system, equal to 100 centimetres or approximately 39.37 inches. Can be area or volume as m2 or m3

Newton (N): the SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one metre per second per second.

Pascal: the unit of pressure found from the force per unit area i.e. 1N/cm2 or 1N/m2 = 1Pa

Kelvin: a temperature scale based the motion of particles -273°C = 0K so more useful to Physics.

Celsius: a temperature scale for everyday use based on the BP and MP of H2O 0°C

Specific Heat Capacity: the energy absorbed by 1kg of matter to raise the temperature by 1°C (Triple Only)

Resources…

Use this PowerPoint for a quick review…5 SLG Part A Units

 

Useful Videos…

Temperature Scales: Kelvin, Celsius, & Fahrenheit @GettinJunkDone

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5 Solids Liquids Gases- Part B “Density and Pressure”

Syllabus Aims…
5.3 know and use the relationship between density, mass and volume:
density = mass / volume
ρ = m / V
5.4 practical: investigate density using direct measurements of mass and volume.
5.5 know and use the relationship between pressure, force and area:
pressure = force / area
p = F / A
5.6 understand that the pressure at a point …

5 Solids Liquids Gases- Part C “Change of State” Triple Only

Syllabus Aims…
5.8P explain why heating a system will change the energy stored within the system and raise its temperature or produce changes of state
5.9P describe the changes that occur when a solid melts to form a liquid, and when a liquid evaporates or boils to form a gas
5.10P describe the arrangement and motion of particles …

5 Solids Liquids Gases- Part D “Ideal Gases”

Syllabus Aims…
5.15 explain how molecules in a gas have a random motion and that they exert a force and hence a pressure on the walls of the container
5.16 understand why there is an absolute zero of temperature which is – 273°C
5.17 describe the Kelvin scale of temperature and be able to convert between the Kelvin …

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