Question

Convection is the transfer of heat from one fluid to another by the movement of the fluid itself. The fluid expands and becomes more buoyant. Explain, what do you understand by the phrase "The fluid expands and becomes more buoyant”.

plzz help​

Answer 1

liquid

Step-by-step explanation:

it means it changes the form to a different way than the first one

Answer 2

Objects become less dense than normal when heated. Hence when heating a fluid, the molecules closer to the heat source becomes hotter and their density reduces (buoyancy), hence, fewer hot molecules since they're denser, displace the buoyant molecules upwards. In so doing, the cooler molecules are now closer to the heat source which will make them also buoyant with time and they'll also be displaced upwards till the entire fluid is evenly heated.