Automobile Engineering in ME
A battery can be charged by

Adding distilled water
Applying a voltage in the same direction to that of charging
Adding sulphuric acid
Applying voltage in the reverse direction to that of charging

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Automobile Engineering in ME
The rigid suspension is beneficial when

It is desired to reduce the unsprung mass
Large changes in load make it necessary to have a large suspension stroke
It is desired to improve tyre to ground contact characteristics
It is desired to have more flexibility in design

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