Question 1

Which of the following best describes the scientific method as presented in the course materials?

Accepted Answer

An iterative process involving observation, hypothesis, prediction, and testing.

Question 2

A scientist observes that a pendulum swings with a regular period. She hypothesizes that the period depends only on the length of the string. Which step should she take next according to the scientific method?

Accepted Answer

Make a prediction based on her hypothesis and design an experiment to test it.

Question 3

Which of the following is NOT a particularly useful skill in doing science, according to the course materials?

Accepted Answer

Memorizing facts

Question 4

Which of the following statements about symmetry in physics is correct?

Accepted Answer

Symmetry means that an object or law remains unchanged under certain operations.

Question 5

A chessboard pattern that extends infinitely in all directions is an example of which type of symmetry?

Accepted Answer

Translational symmetry

Question 6

Which of the following is the correct definition of the meter in the modern SI system?

Accepted Answer

The distance light travels in vacuum in $$1/299,792,458 of a $$second.

Question 7

Which principle states that if event A causes event B, all observers see event A happen first?

Accepted Answer

Principle of causality

Question 8

What two pieces of information are necessary to express any physical quantity?

Accepted Answer

Its value and unit of measure

Question 9

If $$1\ \mathrm{mm}^3 is $$converted to cubic meters, what is the correct value?

Accepted Answer

$$10^{-9}$$\ \mathrm{m}^3$$

Question 10

A measurement is recorded as $$0.0370. $$How many significant digits does this value have?

Accepted Answer

3

Question 11

Which of the following best describes the difference between precision and accuracy?

Accepted Answer

Precision is about repeatability; accuracy is about closeness to the true value.

Question 12

A scientist wants to convert $$4.5$$ inches to millimeters. Given $$1\ \mathrm{in} = 25.4\ \mathrm{mm}$$, what is the correct conversion factor to use?

Accepted Answer

$$\frac{25.4\ \mathrm{mm}}{1\ \mathrm{in}}$$

Question 13

Which of the following is the correct formula for mass density?

Accepted Answer

$$\rho = \frac{m}{V}$$

Question 14

A student measures the width of a paper as $$21.3 mm. $$Which statement about significant digits is correct?

Accepted Answer

All digits are significant because there are no zeros.

Question 15

Which of the following is an example of inductive reasoning in physics?

Accepted Answer

Observing patterns in data and developing a general principle.

Question 16

A painting exhibits symmetry if it remains unchanged under which operation?

Accepted Answer

Any of the above, depending on the painting

Question 17

Which of the following is the correct value for Avogadro's number?

Accepted Answer

$$6.022 	imes 10$$^{23}$$

Question 18

A student claims that the laws of physics are the same everywhere in the universe. Which symmetry principle supports this claim?

Accepted Answer

Translational symmetry

Question 19

Which of the following is the correct definition of the second in the SI system?

Accepted Answer

The duration of $$9,192,631,770$$ periods of radiation from cesium atoms.

Question 20

Which of the following best describes the role of models in the scientific method?

Accepted Answer

Models are simplified conceptual representations used to explain and predict phenomena.

Foundations of Physics: Scientific Method, Symmetry, Matter, Units, and Measurement

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