What is the name given to the piece of equipment umpires use to identify the playing positions on the court

In 1401 a competition to create a set of bronze doors for the baptistery of florence cathedral was held, and this competition is often credited with the beginning of renaissance art t or f?

The three lowest levels of thinking, according to blooms taxonomy, are

Some singers, especially sopranos, are often given what title because of their egoistic tendencies? a. coloratura b. diva c. star d. profundo