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Propanamide could be prepared by

(a) What type of energy changes into electrical energy in electromagnetic induction? (b) Can this energy be retrieved from electrical energy?

The term__refers to data storage system that make it possible for a computer or electronic device to store and retrieve data.

Microbes play a dual role when used for sewage treatment as they not only help in retrieve usable water but also generate fuel. Write in points how this happens?