$$15 \times \frac{2.54}{1} = 38.1 \ \text{cm}$$

$$1.6006 \times 10^4$ \ \text{m/s}$$

$$3.412 \times 10^3$ \ \text{m}$$

Question 1

Which of the following statements best describes the difference between mass and weight?

Accepted Answer

Mass is the amount of matter in an object, while weight is the force of gravity acting on that object.

Question 2

Which of the following is a vector quantity?

Accepted Answer

Displacement

Question 3

A student measures the width of a desk as $$120.0 \ 	ext{cm} \pm 0.5 \ 	ext{cm}. $$What is the percentage uncertainty?

Accepted Answer

$$0.42\%$$

Question 4

Which of the following equations is NOT dimensionally consistent?

Accepted Answer

$$E = m v^2$

Question 5

How many significant figures are in the measurement $$0.00230$$?

Accepted Answer

3

Question 6

Convert $$15$$ inches to centimeters using the correct conversion factor. ($$1 \ 	ext{inch} = 2.54 \ 	ext{cm})$$

Accepted Answer

$$15 	imes \frac{2.54}{1} = 38.1 \ 	ext{cm}$$

Question 7

A runner completes a $$107.2 \ 	ext{m}$$ race in $$16.35 \ 	ext{s}. $$What is the speed, reported with the correct number of significant figures?

Accepted Answer

$$6.58 \ 	ext{m/s}$$

Question 8

Which of the following is the correct scientific notation for $$16006 m/s$$?

Accepted Answer

$$1.6006 	imes 10^4$ \ 	ext{m/s}$$

Question 9

If a formula for distance is given as $$d = v t + \frac{1}{2} a t^2$, what are the dimensions of each term?

Accepted Answer

All terms have dimensions of $$[L]$$

Question 10

Which of the following is a correct order of magnitude estimate for the mass of a car?

Accepted Answer

$$10^3$$ \ 	ext{kg}$$

Question 11

A measurement is recorded as $$1.30 \ 	ext{kg}. $$How many significant figures does it have?

Accepted Answer

3

Question 12

Which of the following is a scalar quantity?

Accepted Answer

Speed

Question 13

If you add $$6.15$$ lbs, $$4.59$$ lbs, and $$2.5$$ lbs, what is the correct total with proper significant figures?

Accepted Answer

$$13.2$$ lbs

Question 14

Which of the following best describes dimensional consistency?

Accepted Answer

Each term in a physical equation must have the same dimensions.

Question 15

A car moves to the right at $$+25 \ 	ext{m/s}$$ and another to the left at $$-25 \ 	ext{m/s}. $$What is the magnitude of the velocity of each car?

Accepted Answer

$$25 \ 	ext{m/s}$$

Question 16

Which of the following is the correct SI unit and abbreviation for mass?

Accepted Answer

Kilogram, kg

Question 17

What is the dimension of acceleration?

Accepted Answer

$$[L]/[T]^2$$

Question 18

Which prefix represents $$10^{-6}$$?

Accepted Answer

micro

Question 19

A distance is measured as $$3412 \ 	ext{m}. $$How should this be written in scientific notation with the correct number of significant figures?

Accepted Answer

$$3.412 	imes 10^3$ \ 	ext{m}$$

Question 20

Which of the following is an example of an order of magnitude calculation?

Accepted Answer

Estimating the number of grains of sand on a beach as $$10^{18}$$

Introduction to Physics: Fundamental Concepts and Tools (Chapter 1 Study Notes)

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