Imagine that you took a road trip. based on the information in the table, what was the average speed of your car? time mile marker 3: 00 pm 38 8: 00 pm 219 express your answer to three significant figures and include the appropriate units. use mi as an abbreviation for miles, and h for hours, or mph can be used to indicate miles per hour.

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 2 options: 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 cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.