# Physics Principles and Problems 2009

## Chapter 1: A Physics Toolkit

### Chapter Test Practice

 1 The standard SI unit of mass is the ____________. Need a Hint? A) kilometer B) kilogram C) pound D) kilomole 2 If one were to divide 3.90 by 7.2, what would the answer be with the correct number of significant digits? Need a Hint? A) 0.54 B) 0.542 C) 1 D) 0.5417 3 The valid digits in a measurement are called _________. Need a Hint? A) uncertain digits B) significant digits C) powers of 10 D) valid digits 4 Solve the following problem and express the answer in scientific notation: 4.75×103 kg + 8.24×103 kg. Need a Hint? A) 1.299x103 kg B) 1.299×104 kg C) 1299×103 kg D) 12,990 kg 5 Convert 243 ng to its equivalent in kilograms. Need a Hint? A) 2.43×10-10 kg B) 2.43×10-11 kg C) 2.43×109 kg D) 2.43×10-7 kg 6 The multiplier for SI units with the prefix pico is __________. Need a Hint? A) 10-15 B) 10-12 C) 10-9 D) 10-6 7 The SI base unit of length is the __________. Need a Hint? A) foot B) meter C) kilometer D) candela 8 In order to convert a quantity expressed in one unit into the same quantity in a different unit, use a(n) __________. Need a Hint? A) calculation coefficient B) notation factor C) conversion factor D) algebraic quantity 9 The multiplier for SI units with the prefix mega is __________. Need a Hint? A) 106 B) 109 C) 1012 D) 1,015 10 Convert 57.7 kg to grams. Need a Hint? A) 5.77 x 105 g B) 5.77×103 g C) 5.77×104 g D) 5.77×106 g 11 Combinations of SI base units are called __________. Need a Hint? A) significant units B) base units C) calculated units D) derived units 12 Which of the following operations would yield an answer of 0.5417 to the correct number of significant digits? Need a Hint? A) 3.900/7.200 B) 3.9000/ 7.20 C) 3.900/7.20 D) 3.9000 / 7.2000 13 The multiplier for SI units with the prefix micro is __________. Need a Hint? A) 10-15 B) 10-12 C) 10-9 D) 10-6 14 Convert 1.45 km to meters. Need a Hint? A) 14.5×103 m B) 1.45×10-3 m C) 0.145×10-3 m D) 1.45×103 m 15 The multiplier for SI units with the prefix femto is __________. Need a Hint? A) 1015 B) 39733 C) 10-9 D) 10-6 16 The standard SI unit of time is the __________. Need a Hint? A) minute B) hour C) millisecond D) second 17 The multiplier for SI units with the prefix deci is __________. Need a Hint? A) 101 B) 102 C) 10-1 D) 10-2 18 The apparent shift in the position of an object when it is viewed from different angles is caused by __________. Need a Hint? A) imprecise measurement B) inaccuracy C) parallax D) faulty instruments 19 In the figure below, if a fourth student measured the spring's length to be 14.2 ± 0.2 cm, would this agree with any of the other students' measurements? (9.0K) Need a Hint? A) Yes, it agrees with only student 1. B) Yes, it agrees only with student 3 C) Yes, it agrees with students 1 and 3. D) No. 20 __________ describes how well the results of an experiment agree with the standard value. Need a Hint? A) Significance B) Accuracy C) Certainty D) Precision 21 __________ describes the degree of exactness in a measurement. Need a Hint? A) Precision B) Significance C) Certainty D) Accuracy 22 The property of a straight line on a graph that is the ratio of the vertical difference between two points to the horizontal difference between the same two points is the __________. Need a Hint? A) slope B) rise C) intercept D) tangent 23 Extrapolating from the figure below, if a mass of 45.0 g were hung on the spring, how long would the spring be? (13.0K) Need a Hint? A) 17.3 cm B) 576 cm C) 3.6 cm D) 46.1 cm 24 What value is calculated by dividing rise by run? Need a Hint? A) acceleration of a moving object exhibiting uniform motion B) angular velocity C) the slope of a straight line D) the angle of a straight line 25 In the figure below, what is the physical meaning of the value for b? (13.0K) Need a Hint? A) It is the distance from the bottom of the spring to the suspended mass. B) It is the length of the spring when no masses are suspended from it. C) It is the length of the spring when the experiment is over. D) It is the distance from the top of the spring to the suspended mass.
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