Physics

• Precision


  Also called reproducibility or repeatability. The degree to which an instrument will give the same reading one the conditions under which the reading is taken remains the same.
• Precision


  • The spread of readings is very small, if repeated readings are taken of the same value. There will be little or no difference in the readings.
  • The system/instrument is said to be very precise if there is a wide range of values, where the readings are very different, the system/instrument is said to be low precision.
• Precision is NOT to be confused with Accuracy (which is a totally different thing).
• Accuracy


  How close the measurement or reading is to the actual or true value.
• Accurate


  If the reading taken is very close to the true value.
• Inaccurate


  If the reading taken is very different or far removed from the true value.
• Precision


  How small the uncertainty the instrument will give.
• Energy can be transferred from one object to another by work done or heat transfer.
• Precision


  If there is a wide range of values, where the readings are very different, the system/instrument is said to be low precision