Physics: Waves: Units
Bayani Gaba-gaba
Wave calculations require just five units, but getting them wrong can throw your answer out by a factor of a thousand. Wavelengths given in nanometres, frequencies in kilohertz, angles in degrees - each needs careful handling before it goes into an equation.
This reference covers the five units for the waves section of the Edexcel specification: degree, hertz, metre, metre per second and second.
Manufura
- Use the following units: degree, hertz (Hz), metre (m), metre/second (m/s) and second (s)
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- Frequency is measured in: A) Metres B) Seconds C) Hertz D) Watts Answer: C
- What is 5 kHz in hertz? A) 0.005 Hz B) 50 Hz C) 500 Hz D) 5000 Hz Answer: D
- The period of a wave is measured in: A) Hertz B) Seconds C) Metres D) Degrees Answer: B
- Which conversion is correct? A) 1 nm = 10^-6 m B) 1 nm = 10^-9 m C) 1 nm = 10^-3 m D) 1 nm = 10^-12 m Answer: B
- Wave speed is measured in: A) Hz B) m/s C) m D) s Answer: B
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Sashen littafi
The Language of Physics: Physical Quantities and Units
Associate physical quantities with their International System of Units (SI)and perform conversions among SI units using scientific notation
"Physics: The Language of Physics: Physical Quantities and Units" 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/1-3-the-language-of-physics-physical-quantities-and-units. Access for free at https://openstax.org/books/physics/pages/1-introduction
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