1. 2500/60 joules/sec
2. 2,500Nm
By adding a vibration at the natural frequency of the medium-A
41kg object that is moving east at 5 m s
First we gotta use an equation of motion:

Our vertical distance d= 100 m, initial vertical speed u = 0 m/s (because velocity is fully horizontal), and vertical acceleration a = 9.8 m/s2 because of gravity. Let's plug it all in!

Now we just need to solve for t:

Hit the calculators, and you'll get 4.5 seconds!
Answer:
because only two electrons can fit in the first orbit around the nucleus, and each period on the table is organized by number of orbits