Difference between revisions of "Absolute Zero"
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===About Absolute Zero=== | ===About Absolute Zero=== | ||
− | At [[Absolute Zero|absolute zero]], [[Molecule|molecular]] motion ceases. | + | *At [[Absolute Zero|absolute zero]], [[Molecule|molecular]] motion ceases. |
− | It is the baseline for the [[Kelvin]] [[temperature]] scale. | + | *It is the baseline for the [[Kelvin]] [[temperature]] scale. |
− | [[Absolute zero]] is equivalent to -273.15°C. | + | *[[Absolute zero]] is equivalent to -273.15°C. |
===Examples=== | ===Examples=== | ||
− | The coldest recorded [[temperature]] in a laboratory setting is a fraction of a [[kelvin]] above [[Absolute Zero|absolute zero]]. | + | *The coldest recorded [[temperature]] in a laboratory setting is a fraction of a [[kelvin]] above [[Absolute Zero|absolute zero]]. |
− | Space probes use devices cooled to near [[Absolute Zero|absolute zero]] to detect faint [[infrared]] signals. | + | *Space probes use devices cooled to near [[Absolute Zero|absolute zero]] to detect faint [[infrared]] signals. |
==Beyond the Curriculum== | ==Beyond the Curriculum== | ||
{{#ev:youtube|https://www.youtube.com/watch?v=W6aL9YyRx1A}} | {{#ev:youtube|https://www.youtube.com/watch?v=W6aL9YyRx1A}} |
Revision as of 16:43, 17 May 2024
Contents
Key Stage 3
Meaning
Absolute zero is the coldest possible temperature in the Universe.
About Absolute Zero
- Absolute zero is -273°C.
Key Stage 4
Meaning
Absolute zero is zero on the Kelvin scale and the coldest possible temperature in the Universe.
About Absolute Zero
- Absolute zero is -273°C.
- As a gas decreases in temperature it decreases in volume. Absolute zero is the temperature at which the volume of the gas would become zero.
- At absolute zero the pressure in a gas becomes zero.
- At absolute zero all the particles in material stop moving, they have no kinetic energy.
References
Edexcel
- Absolute zero, page 193, GCSE Physics, Pearson Edexcel
- Absolute zero, page 204, GCSE Combined Science; The Revision Guide, CGP, Edexcel
- Absolute zero, page 301, GCSE Physics, CGP, Edexcel
- Absolute zero, page 425, GCSE Combined Science, Pearson Edexcel
- Absolute zero, page 97, GCSE Physics; The Revision Guide, CGP, Edexcel
OCR
Key Stage 5
Meaning
Absolute zero is the theoretical temperature at which a system reaches its minimum possible energy, corresponding to 0 K.
About Absolute Zero
- At absolute zero, molecular motion ceases.
- It is the baseline for the Kelvin temperature scale.
- Absolute zero is equivalent to -273.15°C.
Examples
- The coldest recorded temperature in a laboratory setting is a fraction of a kelvin above absolute zero.
- Space probes use devices cooled to near absolute zero to detect faint infrared signals.