Q1 of 269 Page 140

A hydro-power plant converts one from of energy into another. Name the two forms of energy.

A hydroelectric power station converts the kinetic energy of flowing or falling water into electrical energy that can be used in homes and businesses.


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39

A substance X is added to LPG cylinders while filling so as to make the detection of leakage of LPG from the cylinders easy.

(a) Name the substance X


(b) How does substance X make the detection of leakage of LPG easy?

 40

The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles.

(a) Name the device X


(b) How does this device help in controlling air pollution ?

 2

What type of energy is possessed by flowing water?

 3

Flowing water can rotate a turbine. Which type of energy is used up by the turbine?