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List four air pollutants. A coconut of mass 5000 g hangs 15 m above the ground: Name the type of energy possessed by the coconut and calculate its value. Give one example of plants that undergo epigea

Biology

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Answer

b(ii)

750 J\text{750 J}

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Here are the answers to the questions from the image:

  1. a) (ii) List four air pollutants:

Part i

Carbon monoxide

Part ii

Sulfur dioxide

Part iii

Nitrogen oxides

Part iv

Particulate matter

Part b(i)

Name the type of energy possessed by the coconut

A coconut of mass 5000 g hangs 15 m above the ground

*   **Gravitational potential energy**

Part b(ii)

750 J\text{750 J}

Calculate the value of the energy named in (2bi). g = 10 m/s².

  1. Convert the mass from grams to kilograms.

    m=5000 g=50001000 kg=5 kgm = 5000 \text{ g} = \frac{5000}{1000} \text{ kg} = 5 \text{ kg}

  2. Use the formula for gravitational potential energy, PE=mghPE = mgh.

    PE=(5 kg)×(10 m/s2)×(15 m)PE = (5 \text{ kg}) \times (10 \text{ m/s}^2) \times (15 \text{ m})

  3. Calculate the potential energy.

    PE=750 JPE = 750 \text{ J}

    The value of the energy is 750 J\boxed{\text{750 J}}.

Part c(i)

Epigeal germination: *Bean

Give one example of plants that undergo each of the following types of germination

Part c(ii)

Hypogeal germination: *Maize

Part a(i)

Root

State two functions of each of the following plant structures

*   **Anchors the plant firmly in the soil.**
*   **Absorbs water and mineral salts from the soil.**

Part a(ii)

Stem

*   **Supports leaves, flowers, and fruits.**
*   **Transports water and nutrients from the roots to other parts of the plant.**
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