Ignoring air resistance, what maximum speed can be given to a horizontally moving tennis ball at the height of 1.8 m as it passes over the net to remain within the court, which is 12.0 m from the bottom of the net? a) 10.0 m/s
b) 15.0 m/s
c) 20.0 m/s
d) 40.0 m/s

Answer: fn = wcos50 = 38.89(9.81)(cos50) = 245.23 n

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.