bernal choices are provided in threequations,
Hour Bodin
NOW
SECTION (2 marks each
What are the conditions necessary for combustion to take place?
Why are the dams Overniers made broader at the bottom than akan
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Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
The dam is broader at the bottom because the the liquid pressure,i.e.the pressure exerted by the river water increases with depth.so to ensure that the dam doesn't get damaged due to liquid pressure it is made broader at the bottom.
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