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SS1: PHYSICS – 1ST TERM

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  1. Introduction to Physics | Week 1
    4 Topics
    |
    1 Quiz
  2. Measurement I | Week 2
    3 Topics
    |
    1 Quiz
  3. Measurement II | Week 3
    6 Topics
    |
    1 Quiz
  4. Motion | Week 4
    5 Topics
    |
    1 Quiz
  5. Velocity-Time Graph | Week 5
    4 Topics
    |
    1 Quiz
  6. Causes of Motion | Week 6
    5 Topics
    |
    1 Quiz
  7. Work, Energy & Power | Week 7
    3 Topics
  8. Energy Transformation / Power | Week 8
    3 Topics
    |
    1 Quiz
  9. Heat Energy | Week 9
    5 Topics
    |
    1 Quiz
  10. Linear Expansion | Week 10
    7 Topics
    |
    1 Quiz



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Topic Content:

  • Definition of Area Expansivity
  • Calculations on Area Expansivity

When substances are heated, there is an increase in length, breadth and height, hence area and volume also increases.

An increase in area of a solid when heated is called area or superficial expansivity.

Therefore;

Area Expansivity = β

\(\scriptsize (β) = \normalsize \frac {Increase \: in \: Area}{Original \: Area \: \times \: Temperature \: Change}\)

 \(\scriptsize β = \normalsize \frac {A_2 \: – \: A_1}{A_1 \: \times \: (\theta_2 \: – \: \theta_1)}\) 

A2 = New area

 

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