In this installment of Hot Science we present three questions that may help you to better understand buoyancy. The first is a kind of warm-up question, dealing with general buoyancy principles.

The movement and space between particles in a fluid affects the amount of pressure the fluid exerts. This means that the pressure in a fluid changes depending on its height, depth and temperature.

"Where would the scale tip? On the left is a steel ball, on the right a ping-pong ball," Reddit user Veiy wrote, posing the conundrum. "I think the scale would raise to the right since the [buoyancy] ...