[Maximum number: 1]

Which definition is correct and uses only quantities rather than units?

A

Density is mass per cubic metre.

B

Potential difference is energy per unit current.

C

Pressure is force per unit area.

D

Speed is distance travelled per second.

[Maximum number: 2]

show that the distance moved down the slope is 9.3 m ,

(a)

Underline all the base quantities in the following list.
ampere charge current mass second temperature weight

[ 2 ]

[Maximum number: 3]

Measurements made for a sample of metal wire are shown in Fig. 1.1.

Fig. 1.1

(a)

State the appropriate instruments used to make each of these measurements.

[ 3 ]

(i)

length

[ 1 ]

(ii)

diameter

[ 1 ]

(iii)

resistance

[ 1 ]

[Maximum number: 1]

What is a reasonable estimate of the average kinetic energy of an athlete during a 100 m race that takes 10 s ?

A

40 J

B

400J

C

4000J

D

40000 J

[Maximum number: 3]

Make estimates of the following quantities.

(a)

the thickness of a sheet of paper

thickness =mm [1]

[ 1 ]

(b)

the time for sound to travel 100 m in air

[ 1 ]

(c)

the weight of $1000 \mathrm{~cm}^{3}$ of water

\text { weight }=\ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots \ldots . . . \quad \mathrm{N}[1]

[ 1 ]

[Maximum number: 1]

Which estimate is realistic?

A

The kinetic energy of a bus travelling on an expressway is 30000 J .

B

The power of a domestic light is 300 W .

C

The temperature of a hot oven is 300 K .

D

The volume of air in a car tyre is $0.03 \mathrm{~m}^{3}$ .

[Maximum number: 1]

A student estimates the maximum speed of some different moving objects.
Which maximum speed is not a reasonable estimate?

A

container ship: $10 \mathrm{~m} \mathrm{~s}^{-1}$

B

Olympic sprinter: $0.1 \mathrm{~km} \mathrm{~s}^{-1}$

C

racing car: $9000 \mathrm{~cm} \mathrm{~s}^{-1}$

D

snail: $0.01 \mathrm{~km} \mathrm{~h}^{-1}$

[Maximum number: 1]

A student creates a table to show reasonable estimates of some physical quantities.
Which row is not a reasonable estimate?

quantity

value

electric current in a fan heater

12 A

mass of an adult person

70 kg

maximum speed of an Olympic sprint runner

$10 \mathrm{~ms}^{-1}$

water pressure at the bottom of a garden pond

$10^{6} \mathrm{~Pa}$

[Maximum number: 1]

Which term represents a physical quantity?

A

metre

B

percentage uncertainty

C

quark flavour

D

spring constant

[Maximum number: 1]

What must be included in a record of a physical quantity?

A

an integer value for the quantity

B

an SI unit

C

a numerical value for the quantity

D

a unit expressed in base units

Question 1

Question 1

Question 1(a)

Question 1

Question 1(a)

Question 1(a)(i)

Question 1(a)(ii)

Question 1(a)(iii)

Question 1

Question 1

Question 1(a)

Question 1(b)

Question 1(c)

Question 1

Question 1

Question 1

Question 1

Question 1