Read the following scenarios and answer the question in each one.
15. A 17-year-old linebacker for the high school football team had a helmet-to-helmet collision with the running back
from the opposing team. The linebacker was assisted off the field and evaluated by the trainer, who
recommended that he be evaluated in the emergency room. The MRI in the emergency room showed bruising of
the cerebral tissue. What is the diagnosis for this patient?

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.