paper 3 section b. variables : air pressure, temperature. manipulated : responding : constant :...

Paper 3

Section B

Variables : Air pressure , Temperature.Manipulated :Responding : Constant :

temperatureAir pressureVolume of air

inference

MV affects RV

affects temperatureair pressure

hypothesis

• When increases, , increases

Temperature

Air pressure

aim

To investigate the relationship between

and

temperature

pressure

Method of controlling manipulated variable

• Manipulate variable : temperaturecontrol : the first temperature

Heat up the water to 20 0C

Method of measuring responding variable

• Responding variable : pressure

• Measure pressure using : Bourdon gauge

Using Bourdon gauge , measure the pressure and record the data

Analyse data

Temperature / K Pressure / Nm-2

20

3040

50

60

Graph

Temperature / K

Pressure / Nm-

2

variables

• Manipulated :

• Responding :

• Constant :

length

resistance

diameter

inference

• _ affects length

resistance

hypothesis

• When increases, , increases

length

resistance

aim

To investigate the relationship between

and

lengthresistance

Method of controlling manipulated variable

• Manipulated variable : length

Control : the first length : 15 cm

Measure 15 cm length of wire and connect both end at point A and B

• Responding variable : resistance

• Measure potential difference using :

Method of measuring responding variable

Measure potential difference using volmeter and calculate the resistance. Record data

voltmeter

Analyse dataLength / cm

Potential difference / V Resitance / Ω

15

20

25

30

35

Length

Resistance

cm

Ω

Cuba soalan muka surat 5

pressure of water at a depth of 50 m under the sea is greater than the pressure at sea level. Pressure of this magnitude will crush human lungs and even ships unless they are protected by special equipment or made with special materials

Variable

• Depth, pressure

• Manipulated variable : Depth • Responding variable : pressure• Constant : density

• Aim : to investigate the relationship between depth and pressure

• Hypothesis : when the depth increases, the pressure increases.

Aim and hyphotesis

Diagram 4.1 shows an electromagnetic lifting machine used to lift scrap metal. Diagram4.2 shows the observation of the machine when the current flows through the machine isincreased

Diagram 4.1 shows an electromagnetic lifting machine used to lift scrap metal. Diagram4.2 shows the observation of the machine when the current flows through the machine isincreased

Diagram 4.1 shows an electromagnetic lifting machine used to lift scrap metal. Diagram4.2 shows the observation of the machine when the current flows through the machine isincreased

Diagram 4.1 shows an electromagnetic lifting machine used to lift scrap metal. Diagram4.2 shows the observation of the machine when the current flows through the machine isincreased

Diagram 4.1 shows an electromagnetic lifting machine used to lift scrap metal. Diagram4.2 shows the observation of the machine when the current flows through the machine isincreased

Diagram 4.1 shows an electromagnetic lifting machine used to lift scrap metal. Diagram 4.2 shows the observation of the machine when the current flows through the machine is increased.

Variables

• Current, magnetic strength

• Manipulated : current• Responding : magnetic

strength ( number of pin )

variables

• Manipulated : depth of water ( real depth)• Responding : position of image (apparent

depth)

• Constant : density of water

• Inference :Depth of water affect the position of image.

Hypothesis : when real depth increases, the apparent depth increases.

Aim :To investigate the relationship

between depth of water ( real depth ) and position of image ( apparent depth)

Apparatus and material :

tall beaker, meter rule, pins, cork, water, retort stand

procedure

a) Mention manipulated quantity :

Real Depth : start experiment with what depth?? Fill the beaker with water to a height of 20 cm

• b) Method of measuring responding variable : apparent depth

With meter rule, measure the apparent depth.

Repeat experiment : Repeat experiment with different depth such as : 30 cm, 40 cm, 50 cm and 60 cm.

Tabulate dataReal depth / D ( cm) Apparent depth / d (cm)

20

30405060

Analyse dataApparent depth / d ( cm )

Real depth / D (cm)

Constantant wire