Answer: Option (a) is the correct answer.
Explanation:
When rain passes through the air then carbon dioxide present in the air dissolves in the water. Further, this carbon dioxide reacts with water and results in the formation of carbonic acid.
Thus, the rain water becomes acidic in nature and as a result, there will be decrease in its pH.
Hence, we can conclude that rain has a natural pH that is acidic.
Answer:
Manuel function can be used when we move it. Oscillate function automatically moves on its own. The pulse function mimics the pulse of a heart rate and can only be used by pushing the button.
Explanation:
Answer:
green light have high energy
Explanation:
We have given the wavelength of the red light 
Speed of the light 
The energy of the signal is given by 
The frequency of the green light is given by:
So energy 
So green light have high energy
Answer:
chloroplasts
Explanation:
Plants have chloroplasts which are plastids that contains chlorophyll and photosynthesis takes place.
