1. The SI prefix for one-thousandth is
a. mega
b. kilo
c. micro
d. milli
Answer: d
2. The SI prefix for one-millionth (1/1,000,000) is
a. mega
b. milli
c. micro
d. nano
Answer: c
3. The SI prefix for one-tenth is
a. centi
b. deci
c. micro
d. milli
Answer: b
4. Five nursing students measure the height of a patient, each using a different measuring device. They record their results as follows:
Student | A | B | C | D | E |
Height (cm) | 157.48 | 157 | 160 | 157.5 | 157.484 |
Which student used the least precise scale?
a. A
b. B
c. C
d. D
e. E
Answer: c
5. Using the fact that one inch is defined to be 2.54 cm , 2640 ft equals how many kilometers?
a. 0.805 km
b. 0.00559 km
c. 0.0671 km
d. None of the above is correct.
Answer: a
6. Which of the following represents the smallest volume?
a. 20 μL
b. 2.0x10−6 L
c. 0.020 mL
d. 2.0 × 104 nL
e. They all represent the same volume
Answer: b
7. Which of the following represents the smallest volume?
a. 0.000450 L
b. 4.50 × 102 μL
c. 4.50 × 10−1 mL
d. 4.50 × 105 nL
e. They all represent the same volume
Answer: e
8. Which statement is true?
a. Leading zeros that precede nonzero digits are significant.
b. Accuracy can be assessed by calculating the percent error.
c. Accuracy cannot be improved by making replicate measurements and taking the average of those measurements.
d. All of the above are true statements.
e. All of the above are false.
Answer: b
9. Which statement is true?
a. Standard deviation is one way to quantify accuracy.
b. Precision is the agreement between experimental data and the “true” value.
c. Accuracy is the agreement between replicate measurements.
d. All of the above are true statements.
e. All of the above are false.
Answer: e
10. Which statement is true?
a. Standard deviation is one way to quantify precision.
b. Accuracy is the agreement between experimental data and the “true” value.
c. Precision is the agreement between replicate measurements.
d. % Error is one method that can be used to assess accuracy.
e. All of the above are true statements.
f. All of the above are false.
Answer: e
11. Liquid nitrogen (LN2) boils at 77.0K. What is the boiling point of LN2 on the Fahrenheit scale? Remember, F = 1.8C + 32 and K = C + 273.
a.
b.
c. °F
d. None of the above.
Answer: b
12. Express in degree Celsius. Remember, and .
a.
b.
c.
d. None of the above.
Answer: a
13. Express in Kelvins. Remember, and .
a.
b.
c.
d. None of the above.
Answer: c
14. If ethanol has a density of 0.785 g/mL, calculate the volume of 82.5 g of ethanol.
a. 0.785 mL
b. 64.8 mL
c. 0.00952 mL
d. 105 mL
Answer: d
15. What is the density of a piece of metal that has a mass of 0.500 kg and occupies a volume of ?
a.
b.
c.
d.
Answer: b
16. What volume, in cubic centimeter, does a 7.00 kg piece of pure gold occupy? The density of gold is 19.3 g/cm3.
a. 363 cm3
b. 0.363 cm3
c. 2.76 cm3
d. 0.00276 cm3
Answer: a
17. A student recently measured the diameter of a human hair using a micrometer and found it to be 0.0079 cm. Express this number in micrometers .
Answer:
18. Using one or more conversion factors, express 352 µL in units of kL.
Answer:
19. A student recently measured the thickness of 10 textbook pages using a micrometer and found it to be 0.552 mm. Express this number in micrometers .
Answer:
20. The equation of a certain line is given by:
where is the velocity in m/s and is the time in s. What is the slope of this line? What is the y-intercept?
Answer: slope = 0.25, y-intercept = 0.84
21. Perform the following conversions.
Convert the following to scientific notation:
a. 93,000,000
b. 0.552
Convert the following to standard format:
c. 7.89 × 106
d. 4.29645 × 102
Answers: a. ; b. ; c. ; d.
22. Indicate the number of significant figures in each number below.
Number Number of Significant Digits
a. 576,000 ____________
b. 2.0073 ____________
c. 0.00540 ____________
d. 7.0x108 ____________
e. 45.00 ____________
Answers: a. 3; b. 5; c. 3; d. 2; e. 4
23. Indicate the number of significant figures in each number below.
Number Number of Significant Digits
a. 0.041 ____________
b. 200 ____________
c. 42,901 ____________
d. 7,060 ____________
e. 5.000 × 106 ____________
Answer: a. 2; b. 1; c. 5; d. 4; e. 4
24. Indicate the number of significant figures in each number below.
Number Number of Significant Digits
a. 0.00100 m ____________
b. 20 people ____________
c. 78.000 ft ____________
d. 1,000 in. ____________
e. 5.03 × 107 kg ____________
Answers: a. 3; b. exact number, infinite; c. 5; d. 1; e. 3
25. Complete the following table of the SI prefixes.
Prefix Abbreviation Meaning
a. mega __________ __________
b. __________ n __________
c. kilo __________
Answers: a. M, ; b. nano, ; c. k
26. Complete the following table of the SI prefixes.
Prefix Abbreviation Meaning
a. __________ k __________
b. deci __________ __________
c. __________ n
Answers: a. kilo, ; b. d, ; c. nano
27. Complete the following table of the SI prefixes.
Prefix Abbreviation Meaning
a. giga __________ __________
b. __________ µ __________
c. milli __________
Answers: a. G, ; b. micro, ; c. m
28. One way to write the ideal gas law is
Solve the following equation for , the number of particles.
Answer:
29. In physics, a commonly used equation that involves position x, acceleration a, velocity v0, and time t is given by:
Solve this equation for .
Answer:
30. One equation that expresses the relationship between position y, acceleration a, and time t is given by:
Solve this equation for a.
Answer:
31. Calculate E in the following expression and express the result with the proper number of significant figures.
Answer:
32. The formula to calculate work is given by:
If the force is in newtons (N) and the distance is in meters (m), the work will have units of joules (J). Calculate the work done when a force of acts over a distance of .
Answer:
33. Pressure can be calculated using the following formula:
where the force is in units of newtons (N) and the area has units of square meters (m2). If the force is and the area is , calculate the pressure in units of N/m2.
Answer:
34. Perform the following mathematical operation and report your answer with the proper number of significant figures.
5.19 + 1.9 + 0.842
Answer: 7.9
35. Perform the following mathematical operation and report your answer with the proper number of significant figures.
Answer:
36. Perform the following mathematical operation and report your answer with the proper number of significant figures.
257.2 − 19.789
Answer: 237.4
37. Perform the following mathematical operation and report your answer with the proper number of significant figures.
