What is polar covalend?

As a white dwarf cools its radius will not change because? When will the next lunar eclipse be? When removing an ovary what body cavity must open? How have binoculars changed peoples lives since they were invented? What is the term that describes the simultaneous inward movement of both eyes toward each other to maintain single binocular vision? Is coral a rock if so how is it formed and what type is it? Is cypermethrin the same as permethrin? Why does blinking and crying provide protection against pathogens? How tall was the lisbon tsunami? Who theory had a small dense nucleus of protons and neutrons surrounded by randomly moving electrons? Are all carrots purple? What are the most dangerous animals on the planet? Which substance in the gaseous state should be calleda vapour? What is an example of sted? What can contaminate a specimen? Three ways the body regulates itself to maintain homeostasis? What are same between prokaryotes and eukaryotes? Who is responsible for membrane biogenesis 'rough endoplasmic reticulum' or 'smooth endoplasmic reticulum'? You are a colorless odorless gas that glows red when electrical charge is passed through you What are you? What does 30 cm in dm equal?