PHYS 1.4 Formative

​ (a)   is a measure of how close the measured value of a quantity is to its actual value. ​ (b)   is a measure of how close together the values of a series of measurements are to one another.

• Accuracy
• Precision

Which of the following describes the image shown?

• poor accuracy
  good precision

• good accuracy

  poor precision

• poor accuracy

  poor precision

• good accuracy

  good precision

How many significant figures are there in 21.2 cm?

• one

• two

• three

• none

We measure velocity as distance divided by time. If the distance was 21.2 cm and the time was 8.5 s, how many significant figures would you use for your calculated velocity?

• one

• two

• three

• four

On an afternoon fishing trip, you catch a total of three fish weighing 1.1 kg, 1.05 kg, and 1.4 kg. What is the total mass of your catch?

• 3.6 kg

• 3.5 kg

• 3.55 kg

• 3 kg