answer the please Question
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1)First collect some China rose petals and collect them in beaker. Add some warm water. Then keep the China rose petals immersed in water for some time till the water in the beaker turn into light pink colour. ... Those light pink colour solution is the China rose indicator.
2)Use a red marker or red paint and put a large X on one of the cups. Take your anemometer outside and measure the wind speed. To do so, count the number of times the cup with the red mark passes in front of you in 30 seconds. Multiply by two to get revolutions/rotations per minute (rpm).
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I hope this is correct
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