Test bank for physics for scientists and engineers 1st edition by hawkes

that individual measurements do NOT cluster around their mean b?. that individual measurements do cluster around their mean ca. that 99.7% of measurements fall within one standard deviat

MULTIPLE CHOICE

1 Which of the following can be said to represent an area of physics research?

a philosophy

b social behaviour

c evolution of universe

d literature

BLM: Remember

2 Which of these statements is an accurate qualification of physics?

a Physics deals with questions of philosophy

b Physics interacts heavily with other disciplines, such as chemistry and biology

c Physics is concerned only with quantitative analyses

d The domain of physics goes beyond the physical universe

BLM: Remember

3 How can true errors in measurements be identified?

a by calculating standard deviation of measurements

b by calculating standard error of measurements

c by reducing the measurement time

d by taking more measurements

BLM: Remember

4 A student makes multiple measurements of the time it takes a ball to travel through a curved pipe All his measurements fall between 4.52 and 4.53 seconds Which of the following is the correct statement about the accuracy of the measurements?

a The accuracy of the measurements is good

b The accuracy of the measurements is poor

c Since true value is not known, nothing can be said about the accuracy of the measurements

d The accuracy of the measurements is increasing with time

BLM: Higher Order

5 A set of measurements shows a large standard deviation What does that imply?

a that individual measurements do NOT cluster around their mean

b that individual measurements do cluster around their mean

c that 99.7% of measurements fall within one standard deviation

d that 99.7% of measurements fall outside one standard deviation

BLM: Higher Order

Table 1-1

An experimenter makes multiple measurements of oil flow rate through a hydraulic pipe in order to establish relationship between the hydraulic pump and the flow rate The results of this experiment are listed in Table 1-1

Table 1-1

6 Which of these values is the standard error of the mean closest to? Use measured values as given in Table 1-1 to determine your answer

a 1.44

b 14.4

c 32.2

d 36.5

BLM: Higher Order

7 What measure of uncertainty does the standard deviation of the mean correspond to?

a a single value

b all measurements

c the standard deviation

d the mean

BLM: Remember

8 Repeated measurements of a parameter during an experiment revealed an SDOM of 1.4 and a standard deviation of 12.3 Which of these values is closest to the number of data points used to calculate these numbers?

a 9

b 77

c 90

d 114

BLM: Higher Order

9 How many significant figures are in the measurement 29.03450?

a 4

b 5

c 6

d 7

10 In a lab report, the uncertainty in a measured value is NOT explicitly stated in the form of ± notation What does that mean for the uncertainty in the data?

a There is no uncertainty in the measurement

b The uncertainty is too large to be stated

c The significant figures should be assumed to represent uncertainty

d The largest digit in the value represents uncertainty

BLM: Remember

11 Which is the correct way of writing 0.0001386 in scientific notation?

a 1.386 × 10–4

b 1.386 × 10–5

c 1.386 × 10-6

d 1.386 × 10–7

BLM: Higher Order

12 In vacuum, light travels at a speed of approximately 299 000 000 metres per second How is this

written in scientific notation?

a 2.99 × 10–8 m·s–1

b 2.99 × 10–5 m·s–1

c 2.99 × 104 m·s–1

d 2.99 × 108 m·s–1

BLM: Higher Order

13 A student measures the temperature of a liquid using a digital thermometer and gets a value of 40.3°C

He knows that the actual value should be 39.72°C He calculates the difference between the actual and measured values and finds it to be 0.58°C How should he state this difference in the lab report?

a 0.58°C

b 5.8 × 10–1°C

c 0.580°C

d 0.6°C

BLM: Higher Order

14 What should the correct number of significant figures in the answer to the calculation 14.85 × 2.1694 be?

a 3

b 4

c 5

d 6

BLM: Higher Order

15 According to the rules for significant digits, how should the answer for the calculation

be written?

a 72.1

b 72.11

c 72.112

d 72.1121

BLM: Higher Order

16 How should the answer of the calculation be written in scientific notation?

a 4.8 × 105

b 4.9 × 105

c 4.87 × 105

d 4.874 × 105

BLM: Higher Order

17 An experiment is performed to determine the relationship between pressure and temperature of a gas in

a cylinder at constant volume Both quantities are measured with respective gauges during the experiment The temperature is then drawn against pressure on a graph paper Which statement is accurate about the error bars of this graph?

a Since both quantities are measured with gauges, there are no uncertainties and therefore no error bars are needed

b The graph should show both horizontal and vertical error bars

c Only vertical error bars should be drawn on the graph paper

d Only horizontal error bars should be drawn on the graph paper

BLM: Higher Order

18 Candela is a unit of measurement for which quantity?

a distance travelled by light in a year

b electric current

c amount of substance

d light output of a source

BLM: Remember

19 How many molecules does a mole of carbon dioxide gas contain at standard temperature and pressure?

a 6.022

b 6.022 × 1023

c 6.022 × 1025

d The given information is insufficient to yield an answer

BLM: Remember

20 A particle with mass m and velocity v enters a magnetic field and starts moving in a curve of radius r

Which is the correct formula for force experienced by the particle? Use dimensional analysis to determine the answer

a

b

c

d

BLM: Higher Order

21 The surface area of a circular disk is 5 cm2 What is its area in m2?

a 0.0005 m2

b 0.005 m2

c 0.025 m2

d 0.05 m2

BLM: Higher Order

22 Which is the correct SI unit symbol for luminous flux per unit area?

a Lx

b lux

c lx

d lm

BLM: Remember

23 What are the SI units for CV where C stands for electric charge and V for electric potential difference?

a J

b F

c N

d Wb

BLM: Higher Order

24 Which of the following is NOT a base SI unit?

a m

b W

c kg

d s

25 Newton’s second law can be written as F = m a, where F is the force, m is the mass, and a is the

acceleration Which are the base SI units of force as determined from dimensional analysis of this equation?

a g·m·s–2

b kg·m·s–1

c kg·m·s–2

d g·m·s–1

BLM: Higher Order

26 A force of 1.27 × 106·cm·s–2 is acting on a body What is the value of this force in SI units?

a 1.27 N

b 12.7 N

c 127 N

d 1270 N

BLM: Higher Order

27 The gravitational force between two masses m1 and m2 is given by F = G m1 m2 /r 2 , where r is the

centre-to-centre distance between the two masses and G is the universal gravitational constant What are the correct SI units for G as deduced from dimensional analysis of this equation?

a N·m2·kg2

b N·m3·kg–2

c N·m–2·kg2

d N·m2·kg–2

BLM: Higher Order

28 Which of the following statements most accurately qualifies the Fermi problem?

a One must know all relevant information precisely to deduce the answer

b One must make reasonable assumptions about the parameters needed to solve the problem

c One cannot possibly come up with a reasonable answer

d The error in the answer is always too large to ignore

BLM: Remember

29 Two identical coins are tossed in air at the same time What is the probability of getting a head with both coins?

a 0.1

b 0.25

c 0.5

d 0.75

BLM: Higher Order

30 Which of the following is NOT required for Professional Physicist certification from the Canadian

Association of Physicists (CAP)?

a agree to code of ethical conduct

b pass a professional examination

c agree to volunteer for CAP for two years

d complete minimum experience requirements

BLM: Remember

TRUE/FALSE

1 The corrections to gravitational effects calculated from Einstein’s general theory of relativity are fundamental to today’s Global Positioning System (GPS)

BLM: Remember

2 With regard to analyzing experimental results, there is no difference between precision and accuracy

BLM: Remember

3 It is possible to completely remove random errors from measurements through better design of experimental techniques and apparatus

BLM: Remember

4 Through better experimental design, systematic errors in measurements can be decreased

BLM: Remember

5 Standard deviation of the mean, or SDOM, is always added to the mean to calculate the true value

BLM: Remember

6 A zero appearing at the end of a number cannot be a significant digit

BLM: Remember

7 A zero followed by a decimal point is always significant

BLM: Remember

8 The measurement 290.650 has five significant figures.

BLM: Higher Order

9 Error bars are always determined from standard error of measurement

BLM: Remember

10 In any calculation, the number of significant figures of the answer cannot be higher than the number of significant figures of the least precise quantity in the calculation

BLM: Remember

11 Error bars are NOT always symmetric about the data points

BLM: Remember

12 Candela is the base SI unit for electric current

BLM: Remember

13 Weber is a derived SI unit for magnetic flux

BLM: Remember

14 Solving a Fermi problem requires making estimates of parameters associated with the problem

BLM: Remember

15 The numerical value of probability always remains between 0 and 10

BLM: Remember