Q: The speed of light is approximately $$3.00 \times 10^8$ m/s. Convert this speed to yards/week (yd/wk). Use 1$$ \text{ m} = 1.09 \text{ yd}$$ and 1$$ \text{ week} = 604,800 \text{ s}$$.

$$1.84 \times 10$$^{11}$$ yd/wk

Q: When converting $$100 ft$^2 to m$^2$$, which conversion factor should be used and how many times should it be applied?

Use $$1 \text{ ft} = 0.305 \text{ m}$$ twice

Question 1

Which of the following is a physical quantity that requires both a number and a unit for proper measurement?

Accepted Answer

Temperature measured in degrees Celsius

Question 2

Which of the following is the correct SI unit for force?

Accepted Answer

Newton (N)

Question 3

A car travels 5.0 km. Express this distance in meters using the correct metric prefix conversion.

Accepted Answer

$$5.0 	imes 10^3$ m

Question 4

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

Accepted Answer

micro-

Question 5

Express 3,000,000,000 nm in decameters (dam).

Accepted Answer

$$0.3$$ dam

Question 6

Rewrite 299,800,000 m/s in scientific notation.

Accepted Answer

$$2.998 	imes 10^8$ m/s

Question 7

Convert 22 lbs to kilograms using the conversion factor $$1 	ext{ kg} = 2.2 	ext{ lbs}.$$

Accepted Answer

$$10 kg$$

Question 8

The speed of light is approximately $$3.00 	imes 10^8$ m/s. Convert this speed to yards/week (yd/wk). Use 1$$ 	ext{ m} = 1.09 	ext{ yd}$$ and 1$$ 	ext{ week} = 604,800 	ext{ s}$$.

Accepted Answer

$$1.84 	imes 10$$^{11}$$ yd/wk

Question 9

How many significant figures are in the number 0.013200972000?

Accepted Answer

9

Question 10

Which of the following measurements is a vector quantity?

Accepted Answer

80 mph west

Question 11

A student walks 10 m east, then 6 m west. What is the total distance traveled and the displacement?

Accepted Answer

Distance: $$16 m$$, Displacement: $$4 m $$east

Question 12

Which rule should be used to determine the number of significant figures when adding 5.389, 4.3, and 0.103?

Accepted Answer

Round to the least number of decimal places

Question 13

Block A has side lengths $$0.50 m$$, $$0.875 m$$, and $$2.250 m. $$Block B has a volume of $$2.6 m$^3. $$What is the combined volume, expressed with the correct number of significant figures?

Accepted Answer

$$3.0 m$^3$$

Question 14

Which of the following is the correct scientific notation for the mass of Earth, $$5,972,000,000,000,000,000,000,000 kg$$?

Accepted Answer

$$5.972 	imes 10$$^{24}$$ kg

Question 15

When converting $$100 ft$^2 to m$^2$$, which conversion factor should be used and how many times should it be applied?

Accepted Answer

Use $$1 	ext{ ft} = 0.305 	ext{ m}$$ twice

Question 16

Which of the following statements about precision in measurements is correct?

Accepted Answer

A measurement with more digits is more precise

Question 17

Which of the following is a scalar quantity?

Accepted Answer

Temperature

Question 18

If you move from a smaller to a bigger metric unit, what happens to the number?

Accepted Answer

The number becomes smaller

Question 19

Which of the following is the correct way to express $$0.0000529 	imes 10^6$ m in scientific notation?

Accepted Answer

$$5.29 	imes 10^1$ m

Question 20

Which of the following is the correct standard form for $$9.98 	imes 10^7$?

Accepted Answer

99,800,000

Physics Study Guide: Measurement, Units, and Representing Motion

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