Question 1

Which of the following is NOT an SI base unit?

Accepted Answer

Pound

Question 2

A car is traveling at $$38.0\ \mathrm{m/s} on a $$highway where the speed limit is $$75.0\ \mathrm{mi/h}. Is $$the driver exceeding the speed limit? (Use $$1\ \mathrm{mi} = 1609\ \mathrm{m}$$ and $$1\ \mathrm{h} = 3600\ \mathrm{s})$$

Accepted Answer

Yes, the driver is exceeding the speed limit.

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

A measurement is recorded as $$0.00210\ \mathrm{m}. $$How many significant figures does this value 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

Convert $$100\ \mathrm{mi} to $$kilometers. (Use $$1\ \mathrm{mi} = 1.609\ \mathrm{km})$$

Accepted Answer

$$160.9\ \mathrm{km}$$

Question 8

Which of the following is the correct rule for significant figures when multiplying $$25.57\ \mathrm{m} by$$ $$2.45\ \mathrm{m}$$?

Accepted Answer

The result should have as many significant figures as the number with the fewest significant figures.

Question 9

Which of the following is the correct SI unit for electric current?

Accepted Answer

Ampere

Question 10

A student adds $$135\ \mathrm{m}$$ and $$3.25\ \mathrm{m}. $$According to the rules for significant figures, what is the correct result?

Accepted Answer

$$138\ \mathrm{m}$$

Question 11

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

Accepted Answer

An estimate expressed as a power of ten.

Question 12

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

Accepted Answer

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

Question 13

If a measurement is $$1.234 	imes 10$$^{-4}$$, how many significant figures does it have?

Accepted Answer

4

Question 14

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

Accepted Answer

Color

Question 15

Which of the following conversion factors is correct?

Accepted Answer

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

Question 16

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

Accepted Answer

$$L^2$$

Question 17

A measurement is recorded as $$1000. $$How many significant figures does it have?

Accepted Answer

1

Question 18

Which of the following is true about the uncertainty in measurements?

Accepted Answer

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

Question 19

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

Accepted Answer

Kelvin

Question 20

Which of the following best describes the purpose of using SI units in measurements?

Accepted Answer

To provide a comparison framework for measurements.

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

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