The answer is C. an electron in an orbit has a fixed energy.
Answer:The normal favored site in weaners, producers, finishers, and grown-ups is up to 70mm behind the base of the ear. Little piglets are regularly infused into the ham of the rear leg in light of the fact that there isn't a lot of muscle on the neck. This isn't suggested in producers/finishers in view of the chance of abscesses.
Explanation:
Let the observer be 'd' distance away from the thunderstorm and let light take 't' time to reach the observer
Since the speed of sound and light remains constant in a particular medium, we can use
Speed = Distance/Time
For light,
3 x 10^8 = d/t
t = d/(3 x 10^8) -1
For sound,
339 = d/(t + 30) -2
Putting value from 1 in 2.
d = 10^4 m(approx)