Units & Measurement

Choose suitable instrument to measure time?

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State correct SI unit for length (L), mass (m), time (t) and temperature (T)?

• meter (m)

  kilogram (kg)

  second (s)

  Kelvin (K)

• meter (m)

  kilogram (kg)

  second (s)

  Celcius (C)

• kilometer (km)

  kilogram (kg)

  second (s)

  Kelvin (K)

• kilometer (km)

  kilogram (kg)

  hour (h)

  Celcius (C)

Convert 0.00006678 to scientific notation and prefix. Give your answer in two decimals.

0.00055080

Identify how many siginificant figures in that value.

• 8 s.f

• 5 s.f

• 4 s.f

• 3 s.f

Convert 180 km/h to m/s

Choose correct systematic uncertainties:

**hint: multiple answer accepted

• Parallax error

• Random error

• Wrong calibration

• Environmental error

Identify which uncertainties can be committed by students during handling this instrument.

• Random error

• Parallax error

• Enviromental error

• Wrong calibration

Choose (2) important keywords in explaining the concept of measurement:

• observation of attribute

• estimate the attribute

• estimate the magnitude of attribute

• observation of magnitude

Define derived unit & one example of it:

• Definition: single unit

  Example: speed, m/s

• Definition: combination of base units

  Example: length, m

• Definition: single unit

  Example: temperature, K