Learn Polish: Co słychać w pracy? - How are things at work?

Literally, it asks "what can be heard?" or "what is to be heard?". The word co means "what", and słychać is a special impersonal verb form meaning "is heard". In everyday Polish, this is the most common idiom to ask "what's up?" or "how are things?".

Why do we use w instead of na to say "at work"?

English uses the preposition "at" for work, but Polish treats work like a physical place you are inside of, so you use w (in). You are literally "in work".

Why does the dictionary word praca change to pracy here?

When you talk about being located somewhere using the preposition w (in), the noun must take the Locative case. Because praca (work) is a feminine noun ending in "-a", it drops the "-a" and adds "-y" to become pracy.

Can I use Co słychać w... to ask about other things?

Absolutely! It is a great, natural-sounding structure to learn. For example, you can ask Co słychać w szkole? (How are things at school?) or Co słychać w domu? (How are things at home?). Just remember to use the Locative case for the place.