What does it mean for an object to have invariants, and why does one need to worry about them?

In a response of approximately 50 words, explain why it would be essential for the successful a/v technician to participate in additional coursework, presentations and seminars offered by equipment manufacturers as well as annual conferences attended by colleagues in the industry.

The most common battery cable terminal is a that provides a large surface contact area with the ability to tighten the terminal onto the battery post using a nut and bolt.

What does 21 pilots middle aged name as a band 15 years prior to them naming their band 21 pilots?