Week 3 Progress quiz

How many significant figures does the following number have: 0.002040

• 6

• 4

• 3

• 7

Calculate 12.34 + 1.234 + 0.1234

• 13.6974
• 13.697
• 13.70
• 13.7

Round 0.010229 to four sig figs

• 1022
• 1023
• 0.01023
• 0.01022

What best describes the collection of data points shown on the target, where the bulls-eye represents the desired results.

• Accurate and Precise

• Precise but not Accurate

• Accurate but not Precise

• Not Precise or Accurate

A student is calculating the acceleration of a falling object. She records a distance of 20.56m and a time of 2.05s. She calculates the acceleration to be 9.784651  $\frac{m}{s^2}$  . What value should she record using the proper significant figures?

• 9.8  $\frac{m}{s^2}$  

• 9.78  $\frac{m}{s^2}$  

• 9.785 $\frac{m}{s^2}$  

• 9.784651 $\frac{m}{s^2}$  

What is the temperature?

• 20.3 $\pm$ 1 oC

• 23 $\pm$ 1 oC

• 23 $\pm$ 0.5 oC

• 23 $\pm$ 2 oC

Calculate the absolute uncertainty of this measurement:
5.89m±3.2%

• ±0.19m
• ±0.19cm
• ±0.019cm
• ±1.9m

The measured length of the piece of wood should be written:

• 12.55 cm

• 12.55  $\pm$  0.1 mm

• 12.55  $\pm$  0.1 cm

• 12.55  $\pm$  0.05 cm

_______________ describes how much energy is required to raise an object's temperature.

• Conduction
• Convection
• Specific Heat
• Radiation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A student measures the acceleration due to gravity to be 10.2  $\frac{m}{s^2}$ . The accepted value is 9.81  $\frac{m}{s^2}$ . What is the percent error?

• 3.8%

• 4.0%

• 0.04%

• 0.39%