Measurements and Units

Which of the following has both accuracy and precision?

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Which of the following has neither accuracy nor precision?

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Which of the following shows the greatest accuracy?

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Which of the following shows the greatest precision only?

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What is the reading on the vernier caliper?

Hint: Main scale: every interval = 1mm

Vernier Scale: every interval = 0.02mm

• 3.5 mm

• 3.6 mm

• 4 mm

• 3.58 mm

What is the reading on the vernier caliper?

Hint: Main scale: every interval = 1mm

Vernier Scale: every interval = 0.02mm

• 2.68 mm

• 2.76 mm

• 2.00 mm

• 2. 60 mm

What is the reading on the vernier caliper?

Hint: Main scale: every interval = 1mm

Vernier Scale: every interval = 0.01mm

• 1.00 mm

• 0.05 mm

• 0.04 mm

• 1.50 mm

 $90\pm2\ cm$  

Find the value and percent uncertainty of the measurement above.

•  $90\ cm\pm2\%$  
  

•  $88\ cm\pm2.22\%$  

•  $90\ cm\pm2.22\%$  
  

•  $88\ cm\pm2\%$  

 $259\pm5\ mm$  

Find the value and percent uncertainty of the measurement above.

•  $259mm\pm1.93\%$  
  

•  $254mm\pm1.93\%$  

•  $258mm\pm1.93\%$  
  

•  $259mm\pm2\%$  

 $100\pm1\ mm$  

Find the value and percent uncertainty of the measurement above.

•  $101mm\pm1\%$  
  

•  $100mm-1\%$  

•  $100\ mm\ +1\%$  
  

•  $100\ mm\pm1\%$