labreportscience-110809060338-phpapp02

download labreportscience-110809060338-phpapp02

of 8

Transcript of labreportscience-110809060338-phpapp02

  • 8/13/2019 labreportscience-110809060338-phpapp02

    1/8

    PHYSICAL QUANTITIES AND MEASUREMENTSObjective

    To obtain derived quantity from base quantities To ensure consistency, sensitivity and accuracy of instruments

    Inference

    1. Base quantities are the quantities that cannot be defined in terms ofother quantities.2. Derived quantities are physical quantities derived from the base

    quantities through multiplication, division or both.

    3. Density of substance, = mass = mVolume v

    4. Relative density,

    Hypothesis

    1. Measuring physical quantity precisely.2. Differentiate between base and derived quantities.

    Apparatus /Material

    Wooden block, vernier calliper, beam balance, glass rod, ruler, metal block,

    measuring cylinder

  • 8/13/2019 labreportscience-110809060338-phpapp02

    2/8

    Experiment 1a

    Apparatus

    1. Metal block2. Vernier calliper3. Beam balance/ Electronic balance

    Procedure

    1. Measure the dimension of the wooden block by using vernier calliper.2. Weigh the mass of the Metal block by using Beam balance / Electronic

    Balance.3. Record all the data in the TABLE 1.0

    Result

    Dimension Reading

    Height, h cm mWidth, w cm m

    Length, l cm m

    Mass, m g kg

    Volume, V cm3

    m3

    Density, g

    cm3

    kg

    m3

    Relative Density, r

  • 8/13/2019 labreportscience-110809060338-phpapp02

    3/8

    Experiment 1b

    Apparatus

    1. Metal rod2. Micrometer screw gauge / vernier calliper3. Beam balance / electronic balance4. Ruler

    Procedures

    1.

    Measure the dimension of the glass by using Micrometer Screw Gaugeor Vernier Calliper

    2. Record all the data in TABLE 2.0.Result

    Dimension Reading

    Diameter, D cm m

    Length, l cm m

    Mass, m g m

    Volume, V cm3

    m3

    Density, g

    cm3

    kg

    m3

    Relative Density, r

  • 8/13/2019 labreportscience-110809060338-phpapp02

    4/8

    Experiment 1c

    Apparatus

    1. Metal block2. Micrometer screw gauge / vernier calliper3. Beam balance / electronic balance4. Measuring cylinder5. Scissor6. String

    Procedures

    1. Measure the dimension of the metal by using micrometer screw gaugeor vernier callipe.

    2. Record all the data in TABLE 3.0

    Result

    Dimension

    Reading

    AverageTrial 1 Trial 2

    Diameter, D/ width,

    w

    Length, l

    Mass, m

    Experiment Volume,

    Vexp

    Theory volume,

    Vtheory

    - using formulaExperiment density,

    exp

    Theory density,

    theory

    % error for density

    Relative density, r

  • 8/13/2019 labreportscience-110809060338-phpapp02

    5/8

    Questions

    State the precautionary steps to avoid errors in the experiment .

    Repeated reading are taken and the average value is calculated Avoid parallax error Avoid zero error Use instruments which is not defective

    Conclusions

    The derived quantities can be calculated or expressed in terms of basequantities

    Exercising greater care and effort when taking readings

  • 8/13/2019 labreportscience-110809060338-phpapp02

    6/8

    Experiment 1a

    Experiment 1b

    Experiment 1c

  • 8/13/2019 labreportscience-110809060338-phpapp02

    7/8

  • 8/13/2019 labreportscience-110809060338-phpapp02

    8/8