Question

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Answer 1

Answer:

Integrated Weed Management (IWM) is a long-term management approach to manage weeds through certain techniques. These techniques are a combination of biological, physical, chemical, mechanical and cultural practices. Overall, these help to improve crop production, revenue, and environmental condition. Before managing the weeds, we should know the definition and impact of weeds on various components like environment, economic and other parts of society.

Answer 2

$\bold{Answer:-}$

We have to find hνo

hvo =hν − KE,

= h.C/λ

= 1.68 × 10⁵5÷mol/6.023 ×10²³

hvo = 6.626 × 10-³⁴ × 3 × 10⁸ / 300 × 10-⁹m

= 1.68 × 10⁵ / 6.023 × 10²³

= 0.06626 × 10-¹⁷ - 0.2789 × 10-⁸

= 0.06626 × 10-¹⁷ - 0.02789 × 10-¹⁷

hvo = 0.03837 × 10-¹⁷ J

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