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Number
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100

In the measurement '75 kg', which part is referred to as the 'numerical magnitude'?

A.The combination of '75' and 'kg'

B.75

C.kg

D.The mass of the object

B.75

100

ccording to the principles of measurement, what are the two components that must be present to define any physical quantity?

A.A prefix and a base symbol

B.A scalar value and a vector direction

C.A numerical magnitude and a unit

D.A formula and a calculated result

C.A numerical magnitude and a unit

200

What is a reasonable estimate for the height of a standard internal door in a residential building?

A.20 m

B.2.0 m

C.5.0 m

D.0.2 m

B.2.0 m

200

A student measures the length of a desk and records the result as '1.2'. Why is this record considered incomplete in a scientific context?

A.It contains a decimal point which is not allowed in magnitudes

B.The numerical magnitude is too small for a physical object

C.It does not include the name of the instrument used

D.It lacks a unit to provide scale and context

D.It lacks a unit to provide scale and context

300

What is a reasonable estimate for the mass of an average adult human?

A.7 kg

B.70 g

C.700 kg

D.70 kg

D.70 kg

300

Which estimate best represents the thickness of a single sheet of standard printer paper?

A.0.001 mm

B.1.0 cm

C.1.0 mm

D.0.1 mm

D. 0.1 mm

400

When making reasonable estimates of physical quantities, why is it important to use consistent units?

A.To allow for meaningful comparisons between different magnitudes

B.Because numerical magnitudes change depending on the person measuring

C.To ensure that all measurements result in whole numbers

D.Because units are the only part of a physical quantity that matters

A

400

When estimating the speed of a person walking at a normal pace, which value is most appropriate?

A.150 m s−1

B.15 m s−1

C.0.15 m s−1

D.1.5 m s−1

D.1.5 m s−1

500

Which of the following is the most reasonable estimate for the volume of a standard can of soda?

A.35 cm3

B.3.5 cm3

C.350 cm3

D.3500 cm3

C.350 cm3

500

Which of the following represents a reasonable estimate for the mass of a typical medium-sized car?

A.15000 kg

B.15 kg

C.1500 kg

D.150 kg

C.1500 kg