Answer:5.13333333...
Explanation: 7.7 is the distance and an hour and a half is the average speed. You would have to divide the total distance by the total time. So it would be 7.7 divided by 1.5 which would equal 5.13333333333...
When the electric field pierces outward through the section.
Choose the element that has a smaller atomic radius :scandium
Walk out. If it's denser than air, it'll settle to the bottom