The displacement of a particle of a string carrying a travelling wave is given by y = (3.0 cm) sin 6.28(0.50x − 50 t), where x is in centimetre and t…

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The displacement of a particle of a string carrying a travelling wave is given by y = (3.0 cm) sin 6.28(0.50x − 50 t), where x is in centimetre and t in second. Find the speed of the wave.

  1. 1 ms⁻¹ ✓
  2. 50 ms⁻¹
  3. 5 ms⁻¹
  4. 10 ms⁻¹

Explanation

Carbon cycles through: atmosphere (CO₂), plants (photosynthesis fixes carbon), animals (eating plants transfers carbon), decomposition (releases CO₂), respiration (organisms release CO₂), combustion (burning releases CO₂).

Carbon stored in: living organisms, dead organic matter (soil), fossil fuels (ancient organisms), oceans (dissolved CO₂), and limestone (marine organism shells).

Human impact: burning fossil fuels releases stored carbon, increasing atmospheric CO₂. Deforestation removes carbon sinks. Rising CO₂ causes climate change through greenhouse effect. Balancing the cycle is crucial.

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