A burner is placed below the right side of the beaker. Which image shows the motionvof of the liquid that will result? it's a gizmo Convection cells
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the second picture

Explanation:

your answer is c! hope this : )

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me