Question 1

Which of the following is NOT a base quantity in the SI system?

Accepted Answer

Area

Question 2

A car travels at a speed of $$38.0\ \mathrm{m/s}. Is $$the driver exceeding the speed limit of $$75.0\ \mathrm{mi/h}$$? (Use $$1\ \mathrm{mi} = 1609\ \mathrm{m})$$

Accepted Answer

Yes, the driver is exceeding the speed limit.

Question 3

Which of the following best describes a physical property?

Accepted Answer

A property that is measurable and describes the state of a physical system.

Question 4

What is the dimension of acceleration?

Accepted Answer

$$L/T^2$$

Question 5

Which of the following numbers has 4 significant figures?

Accepted Answer

1001

Question 6

When multiplying $$25.57\ \mathrm{m} by$$ $$2.45\ \mathrm{m}$$, how many significant figures should the result have?

Accepted Answer

3

Question 7

A measurement is recorded as $$1.234 	imes 10$$^{-4}$$. How many significant figures does this value have?

Accepted Answer

4

Question 8

Which of the following is the correct SI base unit for thermodynamic temperature?

Accepted Answer

kelvin (K)

Question 9

If the sum $$135\ \mathrm{m} + 3.25\ \mathrm{m} is $$calculated, how many decimal places should the result have?

Accepted Answer

0

Question 10

Which of the following conversion factors is correct?

Accepted Answer

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

Question 11

Dimensional analysis is used to:

Accepted Answer

Check if both sides of an equation have the same dimensions.

Question 12

Which of the following is a derived quantity?

Accepted Answer

Area

Question 13

A measurement of $$0.00210\ \mathrm{m} is $$best expressed as an order of magnitude of:

Accepted Answer

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

Question 14

Which of the following statements about measurement uncertainty is correct?

Accepted Answer

Measured values are only known within the limits of experimental uncertainty.

Question 15

Which of the following is the correct dimension for speed?

Accepted Answer

$$L/T$$

Question 16

A student measures the length of a table as $$2.45\ \mathrm{m}$$ and the width as $$1.234\ \mathrm{m}. $$What is the correct number of significant figures in the calculated area?

Accepted Answer

3

Question 17

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

Accepted Answer

Color

Question 18

The dimension form of the equation $$x = \frac{1}{2} a t^2$ is:

Accepted Answer

$$L = L/T^2$ \cdot T^2$ = L$$

Question 19

Which of the following is the correct conversion for $$1\ \mathrm{in.} to $$centimeters?

Accepted Answer

$$1\ \mathrm{in.} = 2.54\ \mathrm{cm}$$

Question 20

Which of the following best describes the concept of 'order-of-magnitude'?

Accepted Answer

An estimate expressed as a power of ten.

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

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