Measurement of Physical Quantities: Fundamental and Derived

Question 1

Equipment and Materials Needed for Measurement of Physical Quantities

Answer 1

Meterstick
Vernier Caliper
Micrometer
Stopwatch
Cylindrical Hollow Metal Block
Spherical Metal Block
Dynamic Cart
Dynamic Track

Question 2

Physics helps us understand the physical universe by measuring fundamental quantities such as

Answer 2

distance
length
time

Question 3

can measure internal dimensions using the uppermost jaws, external
dimensions using the lower jaws

Answer 3

vernier calipers

Question 4

Vernier calipers commonly used in industry provide a precision to a hundredth of a millimeter or ho wmany micrometers

Answer 4

10 micrometers

Question 5

is a device used widely in mechanical engineering and machining as well
as most mechanical trades for precision measurement.

Answer 5

micrometer

Question 6

The spindle of an ordinary metric
micrometer has _ threads per millimeter, and thus one complete revolution moves the
spindle through a distance of 0.5 millimeter.

Answer 6

2 threads

Question 7

. Thus, the reading is given by the number of ___ divisions
visible on the scale of the sleeve plus the particular division on the thimble which coincides
with the axial line on the sleeve.

Answer 7

milimmeter

Question 8

what is measured for the length

Answer 8

laboratory table (using meter stick)
cylindrical hollow metal block (using Vernier Caliper)
spherical metal block (using Micrometer caliper)

Question 9

what mass is measured

Answer 9

cylindrical hollow metal block
sphere

Question 10

what is measured for a dynamic cart to travel a distance of 2m

Answer 10

time

Question 11

derived quantities measured after experiment

Answer 11

area of table
volume/density of cylindrical hollow metal block and metal sphere
densities by percentage error
speed of dynamic cart

Question 12

measure the area of the table if

length = 4.01 m
width = 1.01m

Answer 12

area = 4.05m^2

Question 13

measure the radius if diameter is 1.245 cm

Answer 13

0.6225cm

Question 14

1m is equals to __ cm

Answer 14

100

Question 15

1m is equals to __ mm

Answer 15

1000

Question 16

1m is equals to ___ um

Answer 16

1000000

Question 17

1m is equals to __ km

Answer 17

0.001km

Question 18

formula for volume of hollow cylindrical metal block

Answer 18

V = π (R2 -r2)h

where R = outer diameter
r - lower diameter

Question 19

density formula

Answer 19

density = mass/volume

Question 20

true value of aluminum

Answer 20

2.71x10^3 kg/m^3

Question 21

calculate the volume given

Do = 1.245cm
Di = 0.66cm
H = 8.805cm
M = 21.0g

Answer 21

7.71 cc

Question 22

calculate the density given

m = 21.0g
v = 7.71cc

Answer 22

2.72g/cc

Question 23

calculate percentage error given

actual density = 2.78g/cc
theoretical density = 2.71/gcc

Answer 23

2.58%

Question 24

percentage error formula

Answer 24

measured - actual /actual * 100

Question 25

metal sphere volume formula

Answer 25

V = 4/3 π r³

Question 26

calculate metal sphere volume given

diameter = 2.431 cm
mass = 67.15g

Answer 26

7.52cc

Question 27

calculate metal sphere density given

mass = 67.15g
volume = 7.52cc

Answer 27

density = 8.93g/cc

Question 28

true value of steel/iron (general)

Answer 28

7.88x10^3 kg/m^3

Question 29

calculate percentage error given

true value = 7.88 g/cc
measured = 8.25 g/cc

Answer 29

4.70%

Question 30

speed formula

Answer 30

s = d/t

Question 31

calculate speed given

d = 2.00m
t = 2.83s

Answer 31

s = 0.707 m/s

Question 32

area for a rectangle formula

Answer 32

l x w

Question 33

a process of comparing a property of an object with a standard quantity

Answer 33

measurement

Question 34

a quantitative observation consisting of a number and a scale

Answer 34

measurement

Question 35

is a definite magnitude of a quantity, defined and adopted by convention or by law, that is used as a standard

Answer 35

unit

Question 36

SYSTEMS OF MEASUREMENT

Answer 36

English System
Metric System
International System of Units (SI)

Question 37

SI means

Answer 37

Le Systeme International d’ Unites

Question 38

Fundamental Physical Quantities in SI units (7)

Answer 38

length [L]
time [T]
mass [M]
electric current [A]
amount of substance [mol], temperature [K]
luminous intensity [Cd].

Question 39

unit for time

Answer 39

seconds

Question 40

unit for length

Answer 40

meters

Question 41

unit for mass

Answer 41

kg

Question 42

SI unit for electric current

Answer 42

A

Question 43

SI unit for amount of substance

Answer 43

mol

Question 44

SI unit for temperature

Answer 44

Kelvin

Question 45

SI unit for luminous intensity

Answer 45

Cd

Question 46

symbol for length

Answer 46

l

Question 47

symbol for mass

Answer 47

m

Question 48

symbol for time

Answer 48

t

Question 49

symbol for electric current

Answer 49

l

Question 50

symbol for thermodynamic temperature

Answer 50

T

Question 51

symbol for amount of substance

Answer 51

n

Question 52

symbol for luminous intensity

Answer 52

Iv

Question 53

prefixes used in the metric system (base unit upwards)

Answer 53

Tera
Giga
Mega
Kilo
Hecto
Deka

Question 54

multiply base unit by

tera

Answer 54

10^12 (1,000,000,000,000)

Question 55

multiply base unit by

giga

Answer 55

10^9 (1,000,000,000)

Question 56

multiply base unit by

mega

Answer 56

1,000,000 (10^6)

Question 57

multiply base unit by

kilo

Answer 57

1,000 (10^3)

Question 58

multiply base unit by

hecto

Answer 58

100 (10^2)

Question 59

multiply base unit by

deka

Answer 59

10

Question 60

prefixes used in the metric system (base unit downwards)

Answer 60

deci
centi
milli
micro
nano
pico
femto

Question 61

multiply base unit by

deci

Answer 61

10^-1 (1/10)

Question 62

multiply base unit by

centi

Answer 62

1/100 (10^-2)

Question 63

multiply base unit by

milli

Answer 63

1/1000 (10^-3)

Question 64

multiply base unit by

micro

Answer 64

1/1000000 (10^-6)

Question 65

multiply base unit by

nano

Answer 65

1/1 000 000 000 (10^-9)

Question 66

multiply base unit by

pico

Answer 66

1 / 1 000 000 000 000 (10^-12)

Question 67

multiply base unit by

femto

Answer 67

1/1,000,000,000,000,000 (10^-15)

Question 68

1 pound = ___ ounces

Answer 68

15

Question 69

1 kilogram = ___ pounds

Answer 69

2.2

Question 70

1 pound = ___ grams

Answer 70

454

Question 71

1 ton = ___ pounds

Answer 71

2000

Question 72

1 liter = ___ quarts

Answer 72

1.0567 quarts

Question 73

1 mL = __ cm

Answer 73

1 cm

Question 74

1 gallon = __ liters

Answer 74

3.78 liters

Question 75

1 gallon = _ quarts

Answer 75

4 quarts

Question 76

4 quarts = ___ fluid ounces

Answer 76

128

Question 77

1 quart = _ pints

Answer 77

2

Question 78

2 pints = ___ fluid ounces

Answer 78

32 ounces

Question 79

1 pint = __ cups

Answer 79

2 cups

Question 80

2 cups = ____

Answer 80

16 fluid ounces

Question 81

density of water

Answer 81

1.00g/mL

Question 82

1 inch = ___ centimeters

Answer 82

2.54

Question 83

1 mile = ___ feet

Answer 83

5280 feet

Question 84

1 mile = ___ kilometers

Answer 84

1.609

Question 85

1 yard = ___ feet

Answer 85

3

Question 86

3 feet = __ inches

Answer 86

36 inches

Question 87

1 yard = ___ meters

Answer 87

0.9144 meters

Question 88

1 meter = _ inches

Answer 88

39.37 inches

Question 89

1 km = ___ yards

Answer 89

1094 yarsd

Question 90

1 kilometer = ___ miles

Answer 90

0.6215 iles

Question 91

1 year = days

Answer 91

365

Question 92

1 year = months

Answer 92

12

Question 93

1 year = weeks

Answer 93

52

Question 94

1 day = hours

Answer 94

24

Question 95

1 hour = minutes

Answer 95

60

Question 96

1 minute = seoncds

Answer 96

60

Question 97

1 cal = J

Answer 97

4.184

Question 98

conversion from C to F

Answer 98

(C*9/5)+32

Question 99

conversion from F to C

Answer 99

= 5/9(F-32)

Question 100

conversion of C to K

Answer 100

C + 273.15

Question 101

pressure units 1 atm = ___ mmHG

Answer 101

760

Question 102

avogadro’s number

Answer 102

6.02x10^23 mole

Question 103

ideal gas constant R

Answer 103

R = 0.0821 L.atm/mol.K

Question 104

speed of light

Answer 104

3.00x10^8 m/s

Question 105

Planck’s constant

Answer 105

= 6.63x10^-3 J.s

Question 106

the measurement is relevant to the question being investigated; correct conclusions can
only be drawn from valid data.

Answer 106

validity

Question 107

describes how close a measurement to the accepted value.

Answer 107

accuracy

Question 108

repeatability or reproducibility of a measurement

Answer 108

precision

Question 109

refers to the agreement among repeated measurements, the “spread” of the measurements or how close they are together

Answer 109

precision

Question 110

a measure of how far a measured quantity might be from the “ true value”

Answer 110

uncertainty

Question 111

Common Sources of Uncertainty

Answer 111

effects of environmental

conditions on the measurement
judgment in reading analog instruments

sensitivity of instruments

rating or stated calibration of the instrument

approximations and assumptions made while doing the measurement

variations in repeated readings made under apparently identical conditions

Question 112

If we say it is 80 km within an accuracy of 1 to 2 km, then 80 has how many significant figures

Answer 112

2

Question 113

If it is precisely 80 km, to within ±0.1 km, then we write how many significant figures

Answer 113

3 (80.0km)

Question 114

(0.745×2.2) /3.885 =

answer in siginificant figures

Answer 114

0.42

Question 115

27.153 + 138.2 – 11.74 =

answer in significant figures

Answer 115

153.6

Question 116

label the parts of vernier caliper

Answer 116

+1

Question 117

part of vernier caliper that is used for measurement of inner diamete

Answer 117

inner caliper jaws

Question 118

part of vernier caliper that is used to measure depth

Answer 118

depth gauge (blade)

Question 119

part of vernier caliper that is the scale on the smaller sliding portion of the caliepr that gives the least significant digits in the reading and subdivides a mark on the main scale into 10,20, or 50m subdivisions

Answer 119

Vernier scale

Question 120

part of vernier caliper that is the fixed portion of the caliepr that gives the most significant digits in reading

Answer 120

main scale

Question 121

part of vernier caliper that is used to keep the jaws in place

Answer 121

screw clamp/lock

Question 122

part of vernier caliper that is used to move the jaws

Answer 122

knurled wheel

Question 123

part of vernier caliper that is used to measure outside diameter

Answer 123

outside caliper jaws

Question 124

label micrometer caliper parts

Answer 124

+1

Question 125

part of micrometer that is the C-shaped body that holds the anvil and barrel in constant relation to each other

Answer 125

frame

Question 126

part of micrometer that is thick because it needs to minimize flexion, expansion, and contraction which would distort the measurement

Answer 126

frame

Question 127

part of micrometer that is the shiny part that the spindle moves toward, and that the sample rest against

Answer 127

anvil

Question 128

part of micrometer that is the stationary round part with the linear scale on it, sometimes vernier markings

Answer 128

sleeve/barrel

Question 129

part of micrometer that is the knurled part (or level) that one can tighten to hold the spindle stationary, such as when momentarily holding a measurement

Answer 129

lock nut/ thimble lock

Question 130

part of micrometer that is the shiny cylindrical part that the thimble causes to move toward the anvil

Answer 130

spindle

Question 131

the part of the one’s thumb turns, with graduated markings

Answer 131

thimble

Question 132

device on one end of handle that limits pressure by slipping at a calibrated torque

Answer 132

ratchet