The height difference is found by

Then the change in potential energy is
Answer:
Control of air–fuel ratio
Oxygen sensors tell the ECU whether the engine is running rich (too much fuel or too little oxygen) or running lean (too much oxygen or too little fuel) as compared to ideal conditions (known as stoichiometric).
Explanation:
Answer:
Velocity of electron will be equal to 
Explanation:
We have given kinetic energy of electron 
Mass of electron 
We have to find velocity of electron
Kinetic energy of electron is equal to
, here m is mass and v is velocity
So 

So velocity of electron will be equal to 