Write any two differences between simple cell and dry cell?

I can only assume that you meant "wet" cell and dry cell in the context of batteries.

A wet-cell battery is the primary type of rechargeable battery and is generally found in aviation, electric utilities, energy storage, and cellphone towers. The difference between a wet-cell battery and dry-cell battery would be that a dry-cell battery does not contain liquid - hence the name.

Explanation:

Wet cell batteries carry a liquid electrolyte such as sulfuric acid -  a hazardous, corrosive liquid. A dry-cell battery does not contain this, and more diminutive dry-cell batteries, such as alkaline or lithium-ion, are typically used in transferable electronics, such as toys, phones, and laptops.

I hope this helps!

depends on what you mean by "group." for order, it would be coleoptera (beetles). for class, it would be insecta (insects). for phylum, it would be the arthropoda (animals with jointed exoskeletons).

explanation:

a longitudinal wave moves energy that is to the direction of the wave’s movement. - true