Basic Principles Of Si Units Symbols And Waves Scorm (1)

About this package

Basic Principles of SI Units, Symbols and Waves introduces the measurement language and wave relationships used in technical information. Examples focus on network cable installation, including cable routes, drum masses, test durations, equipment specifications and signal measurements. Learners practise identifying what a number represents, reading its unit correctly and using the accompanying label to understand exactly what has been measured. The first part covers five SI base units: metre, kilogram, second, ampere and kelvin. It distinguishes a physical quantity from its unit and symbol, with attention to correct capitalisation. Practical examples explain why cable route length differs from straight-line distance, why a test duration is not a clock time, and how kelvin notation identifies a temperature scale distinct from degrees Celsius. These distinctions support clearer reading and recording of installation information. The package then explores eight SI prefixes, from tera and giga through to nano and pico. Learners match names and symbols to powers of ten, distinguish easily confused symbols such as M and m, and convert between prefixed and unprefixed measurements. Examples include data rates, cable lengths, fibre dimensions and signal timings. The emphasis is on keeping the physical quantity unchanged while expressing it on the scale required by a specification or record. The final part introduces waves as a means of transferring energy. Learners compare sound and electromagnetic waves, consider their motion and need for a medium, and read amplitude and wavelength from diagrams. Frequency is explained through complete cycles per second, while decibels are introduced as a way to express sound levels. Calculations use v = fλ to find wave velocity, frequency or wavelength, bringing together wave concepts, unit recognition and prefix conversions. Video content and practical exercises support the explanations.

Who it’s for

This package suits learners developing foundational scientific knowledge for network cable installation and related technical study. It is particularly relevant to those who need to interpret measurements, equipment specifications and basic signal information.

What’s covered

1. Basic SI Units: Recognising Quantities and Symbols

   Identify length, mass, time, electric current and temperature, and match them to metre (m), kilogram (kg), second (s), ampere (A) and kelvin (K). Installation examples cover cable route lengths, drum masses, test durations, current readings and temperature notation, with attention to labels and symbol capitalisation.

2. SI Prefixes: Interpreting Scale and Converting Measurements

   Recognise tera, giga, mega, kilo, milli, micro, nano and pico, including their symbols and powers of ten. Apply their factors to convert between prefixed and unprefixed values, using examples such as data rates, cable lengths, fibre dimensions and signal timings.

3. Waves: Recognising Motion and Calculating Wave Relationships

   Compare sound and electromagnetic waves, including energy transfer, wave motion and medium requirements. Read amplitude and wavelength from diagrams, interpret frequency in hertz and sound levels in decibels, and use v = fλ to calculate wave velocity, frequency or wavelength.

Learning outcomes

By completing this package, learners can:

• Identify the SI units and symbols for length, mass, time, electric current and temperature: metre (m), kilogram (kg), second (s), ampere (A) and kelvin (K).
• Match the SI prefixes tera (T), giga (G), mega (M), kilo (k), milli (m), micro (μ), nano (n) and pico (p) to their names, symbols and powers of ten.
• Apply SI prefix factors to convert measurements between prefixed units and their corresponding unprefixed units.
• Compare sound waves and electromagnetic waves in terms of their wave motion and whether they require a medium for propagation.
• Identify amplitude and wavelength (λ) on wave diagrams, distinguishing maximum displacement from the distance between successive corresponding points.
• Explain frequency (f) as the number of complete wave cycles per second and identify its unit as the hertz (Hz).
• Identify the decibel (dB) as a unit used to express sound level and interpret higher and lower decibel values as higher and lower sound levels.
• Use v = fλ to calculate wave velocity, frequency or wavelength when the other two quantities are given, expressing answers in appropriate SI units.

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