Beverage engineering. the pull tab was a major advance in the engineering design of beverage containers. the tab pivots on a central bolt in the can’s top. when you pull upward on one end of the tab, the other end presses downward on a portion of the can’s top that has been scored. if you pull upward with a 11 n force, what force magnitude acts on the scored section? (you will need to examine a can with a pull tab.)

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.