Q: Which of the following is the correct calculation for the speed of light in miles per hour, given $$3.00 \times 10^8$ m/s and 1$ mile = 1609.3$ m?

$$3.00 \times 10^8$ \div 1609.3 \times 3600$$

Question 1

Which of the following numbers is correctly written in scientific notation?

Accepted Answer

$$2.14 	imes 10$$^{-3}$$

Question 2

How many significant figures are in the measurement $$0.003050 g$$?

Accepted Answer

4

Question 3

Which of the following is an exact number?

Accepted Answer

1000 mg = 1 g

Question 4

A student multiplies $$6.00 m$$ $$	imes$$ $$0.03799 m$$ $$	imes$$ $$120 m. To $$how many significant figures should the answer be reported?

Accepted Answer

3

Question 5

Convert $$0.0150 mg to $$micrograms ($$\mug).$$

Accepted Answer

$$15.0 \ \mu g$$

Question 6

Which of the following prefixes represents the smallest quantity?

Accepted Answer

Pico-

Question 7

A saltwater solution has a mass of $$11.29 g $$and a volume of $$10.4 mL. $$What is its density in $$g/mL$$?

Accepted Answer

$$1.09 \ g/mL$$

Question 8

How many kilometers are in $$78,000$$ millimeters?

Accepted Answer

$$0.078 km$$

Question 9

A section of railroad track has a volume of $$88,000 cm$^3. If $$the steel has a density of $$7.80 g/cm$^3$$, what is the weight in pounds? ($$1 \ kg = 2.205 \ lb)$$

Accepted Answer

$$1,510 lb$

Question 10

Which of the following is the correct relationship for converting meters to feet?

Accepted Answer

$$1 \ m = 3.280 \ ft$$

Question 11

Your new car has a fuel consumption of $$39.0$$ miles/gallon. What is this in km/L? ($$1 \ mi = 1.609 \ km$$, $$1 \ gal = 3.785 \ L)$$

Accepted Answer

$$16.5 km/L$$

Question 12

Which of the following numbers has 4 significant figures?

Accepted Answer

$$0.004200$$

Question 13

What is the volume in cm$$^3 of$$ $$20.0 g of $$ethanol? (Density of ethanol = $$0.79 g/cm$^3)$$

Accepted Answer

$$25.3$$ $$cm^3$

Question 14

Which of the following is NOT a base SI unit?

Accepted Answer

Gram

Question 15

How many minutes are in a year? (Assume 1 year = 365.0 days)

Accepted Answer

$$525,600$$ min

Question 16

Which of the following is the correct calculation for the speed of light in miles per hour, given $$3.00 	imes 10^8$ m/s and 1$ mile = 1609.3$ m?

Accepted Answer

$$3.00 	imes 10^8$ \div 1609.3 	imes 3600$$

Question 17

Which of the following is a correct statement about significant figures in addition and subtraction?

Accepted Answer

The answer should have as many decimal places as the number with the least decimal places.

Question 18

A student adds $$0.432 mi $$and $$18.1 mi. $$What is the correct answer with the proper number of significant digits?

Accepted Answer

$$18.5 mi$$

Question 19

Which of the following is the correct scientific notation for $$0.000160$$?

Accepted Answer

$$1.60 	imes 10$$^{-4}$$

Chapt 2. Measurement and Problem Solving: Scientific Notation, Units, Significant Figures, and Dimensional Analysis

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