Question

1/R= 1/R1+1/R2 ; make R2 the subject​

Answer 1

The resources which can be renewed or reproduced by physical, chemical or mechanical processes are known as Renewable or Replenishable Resources. The renewable resource may further be divided into continuous or flow.

Eg: Solar and wind energy, water, forests and wildlife, etc.

Non-Renewable Resources occur over a very long geological time. These resources take millions of years in their formation. Some of the resources like metals are recyclable and some like fossil fuels cannot be recycled and get exhausted with their use.