Question

Effect of pollution in non biological system

Answer 1

The pie chart below shows the main reasons why agricultural land becomes less productive the table shows how these causes affected three regions of the world during the 1990s

Answer 2

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Hence, the shear of the wire is halved.

Let's find the ratio of the two resistances.

Resistance varies inversely as the shear.

Hence, the multiplier of resistance will be 2.

Resistance varies directly as the length.

Hence, the multiplier of resistance will be 2.

Hence, the ratio of the two resistance will be 1:4.

→ Second resistance: 4R [First resistance: R]

Hence, the change in the resistance is 3R.