A museum sets up a display of fluorescent minerals. Which best describes how electromagnetic waves can be used to enhance the display?.

Idon’t quite understand this problem

What is the coefficient of kinetic friction μk between the block and the tabletop?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.