Solids, Liquids And Gases: Units
Akopọ
Every equation in physics only works when the quantities going into it are measured in the right units. Mixing up grams with kilograms or centimetres with metres is one of the fastest ways to lose marks on a calculation, and it happens more often than you might expect.
This lesson gives you the complete set of SI and derived units that appear across the Solids, Liquids and Gases section of the Edexcel IGCSE. You will practise converting between related units, learn how to spot when a value needs converting before substitution, and build the reflexes that keep unit errors out of your exam work.
Awọn Afojusun
- Use the following units: degree Celsius, 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) and pascal (Pa)
- Use the following unit: joules/kilogram degree Celsius (J/kg C)
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- What is the SI unit of pressure? A) N B) Pa C) J D) kg/m3 Answer: B
- How many cubic centimetres are in one cubic metre? A) 100 B) 1000 C) 10 000 D) 1 000 000 Answer: D
- What is 50 degrees Celsius in kelvin? A) 223 K B) 323 K C) 373 K D) 50 K Answer: B
- Which pair of units both measure the same quantity? A) Pa and J B) Pa and N/m2 C) K and J D) kg and N Answer: B
- What is the unit of specific heat capacity? A) J/kg B) J/(kg K) C) J/(kg degC) D) Both B and C Answer: D
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
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Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Temperature and Thermal Energy
Explain that temperature is a measure of internal kinetic energy
"Physics: Temperature and Thermal Energy" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/11-1-temperature-and-thermal-energy. Access for free at https://openstax.org/books/physics/pages/1-introduction
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