Answer:
B.
Explanation:
Carol did not apply enough force to accelarate the bookshelf and so the forces are still balanced.
Hope this helps!! :)
4 the answer is four sndbskendb
Electric current is the flow of charge due to the potential difference between two terminals per unit time. It is denoted by I and its unit is amp. It can be mathematically expressed as I=Q/t.
If this isn’t what your looking for I need the options they gave you
"Light year" is a distance, not a speed. It's the distance light travels in one year, at the speed of 299,792,458 meters per second.