A young child becomes very sick and his doctor does a series of tests to try to figure out what is causing his illness. His tests show that the child has generalized muscle weakness in many muscles all over his body, cellular damage to his nervous system, and heart irregularities. Because the doctor knows that these organ groups (the brain, the heart, and the muscles) are especially sensitive to cellular energy levels, he believes he has found the answer.

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.