Chapter 1 Pretest

Chapter 1 Pretest

1. THE STANDARD UNIT OF MASS IS THE: A) GRAM, B) KILOGRAM, C) POUND.

1. THE STANDARD UNIT OF MASS IS THE: A) GRAM, B) KILOGRAM, C) POUND.

2. ABSOLUTE ERROR IS AN EXPRESSION OF THE: A) ACCURACY OF A MEASUREMENT, B) PRECISION OF A MEASUREMENT.

2. ABSOLUTE ERROR IS AN EXPRESSION OF THE: A) ACCURACY OF A MEASUREMENT, B) PRECISION OF A MEASUREMENT.

3. WHICH OF THESE MEASUREMENTS DOES NOT HAVE THREE SIGNIFICANT FIGURES: A) 106 000 m, B) 0.00 302 g, C) 320 mL, D) 4.2 X 107 L.

3. WHICH OF THESE MEASUREMENTS DOES NOT HAVE THREE SIGNIFICANT FIGURES: A) 106 000 m, B) 0.00 302 g, C) 320 mL, D) 4.2 X 107 L.

4. MASS IS A MEASURE OF: A) AMOUNT OF SPACE TAKEN UP BY AN OBJECT, B) AMOUNT OF MATTER IN AN OBJECT, C) DENSITY.

4. MASS IS A MEASURE OF: A) AMOUNT OF SPACE TAKEN UP BY AN OBJECT, B) AMOUNT OF MATTER IN AN OBJECT, C) DENSITY.

5. IN PHYSICS, A SCIENTIFIC LAW IS USUALLY EXPRESSED: A) AS A THEORY, B) BY A MATHEMATICAL EQUATION, C) AS AN OBSERVATION, D) IN WORDS.

5. IN PHYSICS, A SCIENTIFIC LAW IS USUALLY EXPRESSED: A) AS A THEORY, B) BY A MATHEMATICAL EQUATION, C) AS AN OBSERVATION, D) IN WORDS.

6. THE SUM OF 1.044 cm, 50.23 cm, and 7.9 cm is: A) 59 cm, B) 59.2 cm, C) 59.17 cm, D) 59.174 cm.

6. THE SUM OF 1.044 cm, 50.23 cm, and 7.9 cm is: A) 59 cm, B) 59.2 cm, C) 59.17 cm, D) 59.174 cm.

7. AN EQUIVALENT OF 3.40 m is: A) 340 cm, B) 3.40 X 104 mm, C) 3.40 X 109

micrometers, D) 0.0340 km.

7. AN EQUIVALENT OF 3.40 m is: A) 340 cm, B) 3.40 X 104 mm, C) 3.40 X 109

micrometers, D) 0.0340 km.

8. THE FORCE NEEDED TO SUPPORT 500 g AT SEA LEVEL IS: A) LESS THAN 1.00 NEWTON, B) BETWEEN 1.00 N AND 5.00 N, C) BETWEEN 5.00 N AND 50.00 N, D) MORE THAN 50.00 N.

8. THE FORCE NEEDED TO SUPPORT 500 g AT SEA LEVEL IS: A) LESS THAN 1.00 NEWTON, B) BETWEEN 1.00 N AND 5.00 N, C) BETWEEN 5.00 N AND 50.00 N, D) MORE THAN 50.00 N.

9. THE STANDARD SECOND IS DEFINED BY USING: A) KRYPTON RED-ORANGE LIGHT, B) A METAL BAR, C) CESIUM ATOMS, D) LIGHT WAVES.

9. THE STANDARD SECOND IS DEFINED BY USING: A) KRYPTON RED-ORANGE LIGHT, B) A METAL BAR, C) CESIUM ATOMS, D) LIGHT WAVES.

10. WHICH OF THE FOLLOWING EXPRESSIONS HAS DIFFERENT ORDER OF MAGNITUDE FROM THE OTHERS? A) 336 000, B) 5.76 X 104, C) 500 X 100, D) 200 000 / 5.

10. WHICH OF THE FOLLOWING EXPRESSIONS HAS DIFFERENT ORDER OF MAGNITUDE FROM THE OTHERS? A) 336 000, B) 5.76 X 104, C) 500 X 100, D) 200 000 / 5.

11. 1 dm3 IS NOT EQUAL TO: A) 0.01 kL, B) 1000 mL, C) 1000 cm3.

11. 1 dm3 IS NOT EQUAL TO: A) 0.01 kL, B) 1000 mL, C) 1000 cm3.

12. Which of the following is an area of physics that studies motion and its causes?a. thermodynamicsb. mechanicsc. quantum mechanicsd. optics

12. Which of the following is an area of physics that studies motion and its causes?a. thermodynamicsb. mechanicsc. quantum mechanicsd. optics

13. The symbols for units of length in order from smallest to largest are: a. m, cm, mm, and km.b. mm, m, cm, and km.c. km, mm, cm, and m.d. mm, cm, m, and km.

13. The symbols for units of length in order from smallest to largest are: a. m, cm, mm, and km.b. mm, m, cm, and km.c. km, mm, cm, and m.d. mm, cm, m, and km.

14. The SI base unit used to measure mass is the:a. meterb. second c. kilogram d. liter

14. The SI base unit used to measure mass is the:a. meterb. second c. kilogram d. liter

15. If some measurements agree closely with each other but differ widely from the actual value, these measurements are:a. neither precise nor accurateb. accurate but not precisec. acceptable as a new standard of accuracyd. precise but not accurate

15. If some measurements agree closely with each other but differ widely from the actual value, these measurements are:a. neither precise nor accurateb. accurate but not precisec. acceptable as a new standard of accuracyd. precise but not accurate

16. What are the basic SI units?

a. meters, kilograms, hoursb. feet, pounds, secondsc. meters, kilograms, secondsd. feet, kilograms, seconds

16. What are the basic SI units?

a. meters, kilograms, hoursb. feet, pounds, secondsc. meters, kilograms, secondsd. feet, kilograms, seconds

1. LIST AND DESCRIBE THE STEPS IN THE SCIENTIFIC METHOD.

Problem – what is it you want to findResearch – what is already knownHypothesis – your guess at the correct answerExperiment – test your hypothesisConclusions – was your hypothesis correct or incorrect

3. NAME THE FUNDAMENTAL UNITS USED IN MECHANICS AND TELL, IN GENERAL, HOW EACH IS DEFINED.

meter – the distance light travels in a tiny fraction of a second.kilogram – the mass of the standard kilogram (the only measure that is still a natural object)second – a certain number of vibrations of a cesium-133 atom

4. A RECTANGULAR BLOCK IS 0.35 m long, 0.20 m wide, and 0.040 m THICK. WHAT IS ITS VOLUME?

35 cm x 20 cm x 4 cm

= 2800 cm3

5. Distinguish between precision and accuracy.

Accuracy is how close a measurement is to the “right “ answer. Precision is how repeatable the measurement is.

6. What is the meaning of these symbols in equations: ?

means “change”

means “summation” (add them up)

7. What are the seven fundamental units?

meter for distancekilogram for masssecond for timeampere for currentkelvin for temperaturemole for amount of substancecandela for luminous intensity