Question 1

Which of the following is NOT an SI base unit?

Accepted Answer

Pound (lb)

Question 2

A car is traveling at $$38.0\ \mathrm{m/s}. $$What is its speed in $$\mathrm{mi/h}$$? (Use $$1\ \mathrm{mi} = 1609\ \mathrm{m})$$

Accepted Answer

$$85.0\ \mathrm{mi/h}$$

Question 3

Which of the following best describes a physical property?

Accepted Answer

A measurable property whose value describes a state of a physical system

Question 4

Which of the following is the correct dimensional formula for acceleration?

Accepted Answer

$$L T$$^{-2}$$

Question 5

If you multiply $$25.57\ \mathrm{m} by$$ $$2.45\ \mathrm{m}$$, how many significant figures should your answer have?

Accepted Answer

3

Question 6

Which of the following statements about dimensional analysis is correct?

Accepted Answer

It is used to check if the units on both sides of an equation are the same.

Question 7

A measurement is recorded as $$0.000123. $$How many significant figures does it have?

Accepted Answer

3

Question 8

Which of the following is the correct order-of-magnitude estimate for $$0.0086\ \mathrm{m}$$?

Accepted Answer

$$10^{-2}$$\ \mathrm{m}$$

Question 9

When adding $$135\ \mathrm{m}$$ and $$3.25\ \mathrm{m}$$, what is the correct result with proper significant figures?

Accepted Answer

$$138\ \mathrm{m}$$

Question 10

Which of the following conversion factors is correct?

Accepted Answer

$$1\ \mathrm{ft} = 0.3048\ \mathrm{m}$$

Question 11

Which of the following is NOT a criterion for the measurement of a property?

Accepted Answer

Color

Question 12

The SI unit for electric current is:

Accepted Answer

Ampere (A)

Question 13

Which of the following best describes the purpose of significant figures in measurements?

Accepted Answer

To indicate the precision of a measurement

Question 14

A distance is measured as $$100\ \mathrm{mi}. $$What is the number of kilometers between the two cities? (Use $$1\ \mathrm{mi} = 1.609\ \mathrm{km})$$

Accepted Answer

$$160.9\ \mathrm{km}$$

Question 15

Which of the following is the correct dimensional formula for velocity?

Accepted Answer

$$L T$$^{-1}$$

Question 16

Which of the following statements is TRUE regarding measurements in physics?

Accepted Answer

Measurements are only as accurate as the instrument and method used.

Question 17

If $$x = \frac{1}{2} a t^2$, what is the dimension of a$ (acceleration)?

Accepted Answer

$$L T$$^{-2}$$

Question 18

Which of the following is the correct number of significant figures in $$1.234 	imes 10$$^{-4}$$?

Accepted Answer

4

Question 19

Which of the following is a derived SI unit?

Accepted Answer

Meter per second (m/s)

Question 20

Which of the following best describes the process of measurement?

Accepted Answer

Assigning a number to a characteristic of an object or event for comparison

Physics and Measurement: SI Units, Dimensional Analysis, and Significant Figures

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