PHYSENGL QUIZ 2

Which of the following should be calculated to get how far one measurement is with the other measurements?

• percent difference

• percent error

• percent ranking

Which of the following shows how close the measurements were done relative to an absolute value?

• percent error

• percent difference

• percent ranking

Which of the following is true about ruler? Tick all that applies.

• Ruler is accurate up to one decimal unit

• Ruler is more accurate than vernier caliper

• Ruler is more accurate than a meterstick

• Ruler is very convenient to use to materials ranging from 0.1-30 cm

TRUE or FALSE:

Vernier caliper is the same with micrometer caliper

• True

• False

What is the density of the material if the mass of a cylinder is 218.5 g and the volume is 24.654 cm^3? Express your answer following the least significant figure rule.

Answer: _______ g/cm^3

If the calculated density is 7.928 g/cm^3 from the measurements, what kind of metal is being used as sample specimen?

Calculate for the percent error if the computed density is 8.820 g/cm^3 and the accepted density os 8.9 g/cm^3. Express your answer to 2 significant figures.

Answer: _______ %

Which of the following best describes the difference between the measurements using ruler and vernier caliper?

Ruler's data: 8.2 g/cc

Vernier caliper: 8.91 g/cc

• The percent difference of the two measurements is 8.30%.

• The percent error of the two measurements is 8.30%.

• The percent difference of the two measurements is 7.97%.

• The percent error of the two measurements is 8.66%.

Check all that applies.

• Vernier caliper can measure up to 3 decimal places of measurements.

• Measurements from vernier caliper has lower percent error compared to measurements from ruler.

• Measurement of masses using digital balance and triple beam balance affects the value of the percent error.

• The percent error from the computed density using the ruler has greater accuracy compared to vernier caliper

Which of the following has correct computation of volume given measurements:

length = 5 cm

width = 110 mm

height = 0.007 m

Tick all that applies.

• 38.5 cc

• 38.5 cm^3

• 3.85 x 10^5 mm^3

• 3.85 x 10^-5 m^3