COMMON TEST (Measurement and Calculations)

8/11/2019 COMMON TEST (Measurement and Calculations)

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CMY 133 COMMON TEST 1: Measurement and Calculations 29 FEBRUARY 2012

SURNAME & INITIALS:_________________________STUDENT NO:_______________ GROUP (e.g. A):______

DURATION / TYDSDUUR : 50 MINUTES MARKS / PUNTE: 35

Maximum

Mark

Mark

obtained

TOTAL: 35 = %

CIRCLE THE LETTER AND UNDERLINE ONECORRECT ANSWER FOR EACH QUESTION.

CODEYOURANSWERSTOSIDE2OFTHEANSWERSHEET.OMKRING DIE LETTER EN ONDERSTREEP EENKORREKTE ANTWOORD VIR ELKE VRAAG.

KODEER JOU ANTWOORDE OP KANT 2VAN DIE ANTWOORDBLAD.

Question 1

Code option J on the answer sheet - this is for control

purposes only

Vraag 1

Kodeer opsie J op die antwoordbladdit is vir

kontroledoeleindes alleenlik.

Question 2

Circle your name and student number on the pink sheet

and answer sheet and then code G

Vraag 2

Omkring jou naam en studentenommer op die pienk

antwoordblad en gewone antwoordstel en kodeer dan G

Question 3

How many significant figures are there in 0.007150 km?

A. 6

B. 5

C. 2

D. 4

E. 2 [2]

Vraag 3

Hoeveel betekenisvolle syfers is daar in 0.007150 km?

A. 6

B. 5

C. 2

D. 4

E. 2 [2]

Question 4

Which of the following is an exact number

A. 15.5 m

B. 6.022 x1023

atoms

C. 0.0872 cm3

D. The count 12 = 1 dozen

E. None of the above

[2]

Vraag 4

Watter een van die volgende is n eksakte getal?

A. 15.5 m

B. 6.022 x1023

atome

C. 0.0872 cm3

D. Die getal 12 = 1 dosyn

E. Geeneen van bogenoemde nie

[2]Question 5

Express the following number in standard scientific

notation: 0.007241 x 10-11

Vraag 5

Druk die volgende getal in standaard wetenskaplike

notasie uit: 0.007241 x 10-11

Working space/ Werksp asie:

A. 7.241 x 10-8

B. 7.241 x 10-14

C. 7241 x 10

-17

D. 7241 x 10

-5

E. It is already written in scientific notation [2]

A. 7.241 x 10-

B. 7.241 x 10-14

C. 7241 x 10

-17

D. 7241 x 10

-5

E. Dit is reeds in wetenskaplike notasie. [2]


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Question 6

Calculate the following and round to the correct number

of significant figures: 519.44 m x 21 m =. How

many significant figures should the answer have?

Vraag 6

Bereken die volgende en rond af tot die korrekte aantal

betekenisvolle syfers: 519.44 m x 21 m =.

Hoeveel betekenisvolle syfers behoort die antwoord te

h?

Working space / Werkspasie:

A. 10908 m2; 5 significant figures

B. 10910 m2; 5 significant figures

C. 11 x 103m; 2 significant figures

D. 11 x 103m

2; 2 significant figures

E. 11 m2; 2 significant figures [2]

A. 10908 m2; 5 betekenisvolle syfers

B. 10910 m2; 5 betekenisvolle syfers

C. 11 x 103m; 2 betekenisvolle syfers

D. 11 x 103m

2; 2 betekenisvolle syfers

E. 11 m2; 2 betekenisvolle syfers [2]

Question 7

What is the sum of the following, rounded to the correct

number of significant figures: 720.34; 645.1; 245.897;

9984

Vraag 7

Wat is die som van die volgende, afgerond tot die

korrekte aantal betekenisvolle syfers:

720.34; 645.1;

245.897; 9984


A. 11595.34 ; 7 significant figures

B. 11595.3 ; 6 significant figures

C. 11595 ; 5 significant figures

D. 11590 ; 5 significant figures

E. 11590.0 ; 6 significant figures

[2]

A. 11595.34 ; 7 betekenisvolle syfers

B. 11595.3 ; 6 betekenisvolle syfers

C. 11595 ; 5 betekenisvolle syfers

D. 11590 ; 5 betekenisvolle syfers

E. 11590.0 ; 6 betekenisvolle syfers

[2]

Question 8

Calculate the following and express the answer in

scientific notation:

[4.6 x101] [0.21 x10-3] =

[1.64 x 1034

]

Vraag 8

Bereken die volgende en druk die antwoord uit inwetenskaplike notasie:

[4.6 x101] [0.21 x10-3] =

[1.64 x 1034

]


A. 4.1 x 10-31

B. 5.89 x 10-37

C. 5.9 x 10-37

D. 9.6 x10-31

E. 2.80 x10 -36 [2]

A. 4.1 x 10-31

B. 5.89 x 10-37

C. 5.9 x 10-37

D. 9.6 x10-31

E. 2.80 x10 -36 [2]


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Question 9

A police officer pulls a student over and informs him he

was going 85 km/h in a 60km/h zone. The student

explains that he has been watching his speedometer,

and it has been at exactly 60 km/h for the last 15

minutes. The officer says he believes the student, but

writes him a ticket anyway. The officer is essentially

claiming that:

A. The students speedometer is not precise

B. The students speedometer is precise but

not accurate

C. The students speedometer is neither accurate

nor precise

D. The students speedometer is both accurate

and precise, but he is giving him the ticket

anyway

E. The students speedometer is accurate but not

precise [2]

Vraag 9

n Polisie-offisier trek n student af en lig hom in dat hy

85 km/h in n 60 km/h sone gery het. Die student

verduidelik dat hy sy spoedmeter dopgehou het en dat

dit vir die laaste 15 minute op presies 60 km/h gestaan

het. Die offisier s hy glo die student, maar skryf in elk

geval vir hom n kaartjie uit. Die offisier handhaaf in

beginsel die standpunt dat:

A. Die student se spoedmeter is nie presies nie

B. Die student se spoedmeter presies is, maar

nie akkuraat nie

C. Die student se spoedmeter nie presies of

akkuraat is nie

D. Die student se spoedmeter beide akkuraat

en presies is, maar hy gee hom in elk geval n

kaartjie

E. Die student se spoedmeter akkuraat is, maar

nie presies nie. [2]

Question 10

Mogapi is testing a new electronic balance in thelaboratory. He puts a standard 50.00 g mass on the

balance, records the measurement, and removes the

mass. Then he repeats the process 3 more times. In

the end, he observes the following masses: 50.06 g,

49.94 g, 49.90 g and 50.09 g. He concludes that:

Vraag 10

Mogapi toets n nuwe elektroniese skaal (balans) in dielaboratorium. Hy plaas n 50.00 g massa op die skaal,

teken die lesing aan en verwyder die massa. Dan

herhaal hy die proses nog 3 keer. Aan die einde, het hy

die volgende massa-lesings: 50.06 g, 49.94 g, 49.90 g

en 50.09 g. Hy maak die gevolgtrekking dat:


A. the balance is not accurate, and needs to be

calibrated.

B. the balance is not precise, and he should use

the average of repeated weighing.

C. the balance is neither accurate nor precise.

D. the balance is both accurate and precise.

E. none of the above [2]

A. die balans nie akkuraat is nie en gekalibreer

behoort te word.

B. die balans nie presies is nie en dat hy die

gemiddeld van herhaalde lesings moet neem.

C. die balans nie akkuraat of presies is nie

D. die balans beide akkuraat en presies is.

E. Nie een van die bogenoemde nie. [2]

Question 11

The conversion factors required when converting from

metres to centimetres are:

Vraag 11

Die omskakelingsfaktore wat gebruik word wanneer

meter na sentimeter omgeskakel word, is:


A. 1 cm / 102m and 10

2m / 1cm

B. 102m / 1 cm and 1 cm / 10

-2m

C. 1 cm / 10-2

m and 10-2

m / 1 cm

D. 1 m / 102cm and 1 cm / 10

2m

E. None of the above [2]

A. 1 cm / 102m en 10

2m / 1cm

B. 102m / 1 cm en 1 cm / 10

-2m

C. 1 cm / 10-2

m en 10-2

m / 1 cm

D. 1 m / 102cm en 1 cm / 10

2m

E. Nie een van die bogenoemde nie. [2]


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Question 12

Five different lectures score the student assignment out

of 10 as according to the following table.

Vraag 12

Vyf verskillende dosente gee n punt uit 10 virn studentse opdrag, soos op die volgende tabel getoon.

Lecturers / Dosente Marks /10 Pun te /10

1 9

2 73 6

4 7

5 3

The contribution of each lecturer to the final total is

different. Lecturer 1s score weighs 15 while the other

lecturers scores weigh 1. Calculate the weighted

average of the students marks.

Die bydrae (gewig) van elke dosent tot die finale totaal

is verskillend. Dosent 1 se punt weeg 15, terwyl die

ander dosente se onderskeie punt 1 weeg. Bereken die

beswaarde gemiddeld van die student se punte.


A. 6.4

B. 64 %

C. 8.3

D. 7.2

E. 79%

[2]

A. 6.4

B. 64 %

C. 8.3

D. 7.2

E. 79%

[2]

Question 13

Using conversion factors to convert 1.8to cm3,

gives:

Vraag 13

Gebruik omskakelingsfaktore om 1.8 uit te druk in

cm3:


A. 1.8 x 10-12

cm3

B. 1.8 x103cm

3

C. 1.8 x106cm

3

D. 1.8 x10-3

cm3

E. Impossible to tell [2]

A. 1.8 x 10-12

cm3

B. 1.8 x103cm

3

C. 1.8 x106cm

3

D. 1.8 x10-3

cm3

E. Onmoontlik om te s [2]


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Question 14

1 litre is equivalent to m3.

Vraag 14

1 liter is ekwivalent aan .m3


A. 1 m3

B. 1000 m3

C. 0.1 m3

D. 0.001 m3

E. 0.01 m3 [2]

A. 1 m3

B. 1000 m3

C. 0.1 m3

D. 0.001 m3

E. 0.01 m3 [2]

Question 15

Use conversion factors to convert the following and

express your answer in scientific notation:

7.69 m to n

Vraag 15

Gebruik omskakelingsfaktore om die volgende

omskakeling te doen en gee jou antwoord in

wetenskaplike notasie:

7.69 m to n


A. 7.69 x 1012

n

B. 7.69 x 10-12

n

C. 7.69 x 10-6

n

D. 7.69 x 106

nE. 769 x 10

4n [2]

A. 7.69 x 1012

n

B. 7.69 x 10-12

n

C. 7.69 x 10-6

n

D. 7.69 x 106

n

E. 769 x 104n [2]

Question 16

Use conversion factors to convert the following:

1.5 mg/ to kg/p

Vraag 16

Gebruik omskakelingsfaktore vir die volgendeomskakeling:

1.5 mg/ na kg/p


A. 1.5 x 10-9

kg/p

B. 1.5 x 10-12

kg/p

C. 1.5 x 10-15

kg/p

D. 1.5 x 10-6

kg/p

E. 1.5 x 10-18

kg/p [3]

A. 1.5 x 10-9

kg/p

B. 1.5 x 10-12

kg/p

C. 1.5 x 10-15

kg/p

D. 1.5 x 10-6

kg/p

E. 1.5 x 10-18

kg/p [3]


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Question 17

The concentration of carbon monoxide in an urban flat is

61 g/m3. What mass of carbon monoxide (in grams) is

present in a room measuring 2.5m x 3.2m x 2.8m?

Vraag 17

Die konsentrasie van koolstofmonoksied in n

voorstedelike gebied is 61 g/m3. Watter massa

koolstofmonoksied (in gram) is teenwoordig in n vertrek

met afmetings van 2.5m x 3.2m x 2.8m?


A. 0.367 x 10-6

g

B. 1.3664 x 109g

C. 1.4 x 10-3g

D. 1.3664 x 10-3

g

E. 0.367 x 106g [3]

A. 0.367 x 10-6

g

B. 1.3664 x 109g

C. 1.4 x 10-3g

D. 1.3664 x 10-3

g

E. 0.367 x 106g [3]

Question 18

The density of a solution of sulphuric acid is 1.198 g/cm3

and it is 36.17 % acid by mass. What volume of the acid

solution (in millilitres) would contain 116 g of

sulphuric acid?

Vraag 18

Die digtheid van n oplossing swaelsuur is 1.198 g/cm3

en die massapersentasie van die suur is 36.17 %.

Watter volume van die suuroplossing (in milliliter) bevat

116 g swaelsuur?


A. 268 m

B. 267.7 m

C. 35.02 m

D. 384.2 m

E. 384 m [3]

A. 268 m

B. 267.7 m

C. 35.02 m

D. 384.2 m

E. 384 m [3]

MARKS / PUNTE: [35]

COMMON TEST (Measurement and Calculations)

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