Unit Review

Unit Review

Realm of Physics

Physical Quantities, Units, and Measurements

Accuracy, Precision, Errors, and Uncertainties

Multiple Choice

Given a list of liquid measurements: 31.6 L, 31.8 L, 31.9 L, 32.1 L, and 32.3 L. If the accepted value is 32 L, what is the value of uncertainty?

• 0.1 L

• 0.2 L

• 0.3 L

• 0.4 L

Multiple Choice

What shape best describes a steradian?

Multiple Choice

Who was the man shown in the image?

• Albert Einstein

• Neil Henrik David Bohr

• Stephen William Hawking

Multiple Select

Which of the following is true about the rules for significant figures?

• All non-zero digits are significant.

• Zeroes between non-zero digits are significant.

• Terminal zeros in a number without decimal are significant.

• Terminal zeros that are also to the right of the decimal point of a number are significant.

Multiple Choice

The International System of Units was known to be a British system of units

• True

• False

Multiple Choice

True or accepted value depends on the degree of accuracy.

• True

• False

Multiple Select

Which of the following is true about the factors of uncertainty?

• Limitations of measuring devices

• Skills of the person making the measurement

• Irregularities in the object being measured

• Any other factors that affect the outcome

Multiple Choice

A list of boiling point measurements are as follows: 401.21 K, 401.45 K, 402.32 K, and 402.50 K. If the accepted value is 402 K, what will be the value of the percent uncertainty?

• 0.0197%

• 0.197%

• 1.97%

Multiple Choice

Who was the man shown in the picture?

• Casimiro V. Del Rosario

• Gregorio Y. Zarra

• Pedro B. Escuro

Multiple Choice

Which of the following is not a derived quantity?

• Area

• Length

• Volume

• Speed

Multiple Select

Which of the following is considered as a random error?

• Late reaction time

• Negative value on the measuring instrument

• Technique on handling the measuring instruments

• Calibration of the measuring instruments

Multiple Choice

The volume of a substance has an accepted value of 15 L. Which of the following sets of measurements best represents good accuracy?

• 14.7 L, 14.9 L, 15.5 L, 15.8 L

• 14.4 L, 14.5 L, 14.6 L, 15.0 L

• 14.5 L, 14.8 L, 15.3 L, 15.4 L

• 14.8 L, 14.9 L, 15.1 L, 15.6 L

Multiple Select

Which of the following is true about systematic errors?

• Zero error in measuring instrument

• Poor calibration of the instrument

• Incorrect calibration on the measuring instruments

• Technique in conducting the procedure

Multiple Choice

What is the SI unit for electric current?

• Ampere

• Candela

• Kelvin

• Newton

Multiple Choice

Where do we use the fundamental unit luminous intensity for?

Multiple Select

Which of the following calculations of significant figures is wrong?

• 5.1 + 33.301 = 38.401

• 3.201 - 1.02 + 4.7 = 6.9

• 7.94 / 3.078 = 2.6

Multiple Choice

The length of an object is known to be 16 m. A series of measurements were conducted and the results were: 15.7 m, 15.8 m, 15.9 m, 16.1 m, and 16.3 m. The set of values is best described as?

• accurate and precise

• precise but not accurate

• accurate but not precise

• neither accurate nor precise