Which statement can be supported by using a position-time graph? A negative slope results when an individual is moving away from the origin. A horizontal line on the graph means the individual is moving at a non-zero velocity. A positive slope results when an individual is moving away from the origin. The speed of an individual cannot be determined from this type of graph.

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.