Hi there!
Normal rain has a pH between 5.0 and 5.5, which is slightly acidic on the pH scale. Acid rain on the other hand has an average pH of 4.0, much more acidic than your average rain.
Therefore, the most likely pH of acid rain would be 4.0.
Answer:
4. Electrons move from higher energy states to lower energy states.
Explanation:
When electrons fall from a higher (excited) energy state to a lower energy state, it loses/gives out energy.
This energy is given out by the emission of photons (quanta of light) by the electron.
Answer:
They are equal
Explanation:
angle of incidence = angle of reflection
D.6.22N. because .42kg * 14.8m/s=6.22 N[meaning newtons}.
<span>they have to be selective permeable to filter out the waste products but allow the nutrients and blood cells to pass through. </span>