An astronaut is walking in space. which of these would have the greatest speed as observed by the astronaut? a. a high speed electron b. a strong magnetic field c. an electromagnetic wave d. a longitudinal wave carrying sound

An astronaut is walking in space. Which of these would have the greatest speed as observed by the astronaut. And the answer is C. Electromagnetic Waves

Answer will help you

The answer is water molecules are split.cellular respiration and photosynthesis are complement  reactions to each other. these are reverse reactions. in cellular respiration glucose and oxygen yield water and carbon dioxide. so, when respiration begins,  glucose molecules are split. in the opposite reaction - in photosynthesis, carbon dioxide and water yield glucose and oxygen. thus,  when respiration begins, water molecules are split.

That big glowy thing in the sky is called the sun