Answer:isotopes
Explanation:Isotopes form when the number of neutrons and atomic number change except for the protons don't change
Answer:
maybe it is the first one
Kinetic energy is proportional to the square of the speed. So when anything or anybody speeds up, its kinetic energy increases.
It's the only star in the sky (visible from the northern hemisphere) that never seems to move. It stays at almost exactly the same point in the sky, while the other stars all circle around it once a day.
Incomplete question. Missing part:
"it took him 10 seconds to move the couch. What was his power?"
Answer:
50 W
Explanation:
The power developed is given by:
where
W is the work done
t is the time taken
In this problem,
W = 500 J
t = 10.0 s
Substituting into the equation, we find
