What is the potential energy of an electron and a proton in a hydrogen atom if the distance between them is 5.3 x 10-11 m

Why does a red shoe appear red in daylight

Which type of fossil does this image depict?

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean