Physics

Quasi Constant volume

Explanation

Q = CV

Q – Charge

C – Capacity

V – Voltage

Chemistry

Electrochemical series

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Explanation:

Electrochemical series

Potassium > Sodium > Calcium > Magnesium > Aluminium > Zinc > Iron > Tin > Lead > Hydrogen > Copper > Silver > Gold

Biology

Enzymes: classification

"Over The HILL"

Explanation

O - Oxidoreductases 

T - Transferases

 H - Hydrolases

 I - Isomerases

 L - Ligases

 L – Lyases