If four wave crests pass a pole each second:
1. what is the speed of the wave?
2. what is it's period?

1. The speed of the wave can be calculated using the formula:
s = number of waves / time
s = 4 waves / 1 s
s = 4 waves / s

2. The period is simply the reciprocal of the speed of the wave or:
P = time / number of waves
P = 1 s / 4 waves
P = 0.24 s/waves

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.