20. A confused bird flies 250 meters north and then turns and flies 350 meters east. After a short rest in a tree, it travels 150 meters north followed by 50 meters west.
a. Sketch the flight path
b. Find the magnitude of the displacement

The sources of energy can be broadly classified into two categories: renewable and non-renewable resources.

Non-renewable resources are those which are finite resources and do not last forever. Fossil fuels ; coal, oil and natural gas are non-renewable resources.

In contrast, renewable resources are those which can be naturally replenished and do not pose the risk of extinction. This includes solar energy, wind energy, geothermal energy, hydroelectric energy and biomass.