Which way does the direction arrow always points

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?

What is the role of lenses in microscopy?

The amount of heat required to change liquid water to vapor at its boiling temperature is 2256 kj/kg. the amount of heat required to change liquid mercury to its vapor state at its boiling temperature is 295 kj/kg. one kg of each substance is currently at its boiling point. how will the amount of thermal energy required to change each substance from a liquid to a gas differ?