Measurements, Accuracy, Precision, and Instruments Flashcards

Physics Observations and Measurements

Why, What, and How We Measure

• Physics relies on observations and theories. Accurate measurements are crucial for testing these theories.

What is Measurement?

• Measurement compares an object's properties to a standard quantity.
• Aim for accurate and precise data through:
  • Suitable instruments
  • Suitable conditions
  • Suitable method

Accuracy and Precision

• Accuracy: How close a measurement is to the true value.
• Precision: How close repeated measurements are to each other.
• Precision is independent of accuracy.

Instruments for Measuring Physical Quantities

• Mass:
  • Instrument: Triple Beam Balance
  • Unit: gram (g)
  • Precision: 0.1g
  • Minimum Value: 0.0g
  • Maximum Value: 610.0g
• Length:
  • Instrument: Metre Ruler
  • Unit: cm
  • Precision: 0.1cm
  • Minimum Value: 0.0cm
  • Maximum Value: 100.0cm
• Time:
  • Instrument: Stopwatch
  • Unit: Minutes & seconds
  • Precision: 0.01s
  • Minimum Value: 0.00s
  • Maximum Value: 59min:59.99s
• Temperature:
  • Instrument: Thermometer
  • Unit: °C
  • Precision: 1°C
  • Minimum Value: -10°C
  • Maximum Value: 110°C
• Electric Current:
  • Instrument: Ammeter
  • Unit: A
  • Precision: 0.2A
  • Minimum Value: 0.0A
  • Maximum Value: 10.0A