Answer:
a.
Explanation:
Remeber speed and velocity are the same concept, it just speed is scalar, meaning it doesn't have a direction nor it negative.
So technically thr car had a constant speed over 75 seconds.
If thr car has a constant speed, the car isn't speeding up or slowing down so it has accleration of 0 so the answer is a.
If committees is an option it is the correct one.
Answer:
The correct option is energy levels
Explanation:
Rutherford's model of an atom suggests that an atom has a tiny positively charged central mass (now called the nucleus) which is surrounded by electrons (negatively charged) in a <em>cloud</em>-like manner.
Bohr's model went a bit further than the Rutherford's model in describing an atom by suggesting that the electrons which surrounds in the nucleus travel in <u>fixed circular orbits</u>. This description by <em>Bohr was able to describe the energy levels of orbitals which assumes that smallest orbitals have the lowest energy while the largest orbitals have the highest energy</em>.