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Answers
Stick
Bamboo rool ×4
Two woods
Pls mark as brainliest i need 2 more to go to next rank
Collect the following items:
4 small paper cups ( used ice cream cups), 2 strips of cardboard ( 20 cm long and 2 cm wide) gum, stapler, a sketch pen and a sharpened pencil with eraser at one end .
Take a scale; draw crosses on the cardboard strips . This will give you the centres of the strips.
Fix the strips at the centre, putting one over the other so that they
make a plus (+) sign. Now fix the cups at the ends of the strips. Colour
the outer surface of one cup with a marker or a sketch pen. All the 4
cups should face in the same direction.
Push a pin through the centre of the strips and
the cups to the eraser of the pencil. Check that the strips rotate freely
when you blow on the cups. Your anemometer is ready. Counting the
number of rotations per minute will give you an estimate of the speed of
the wind. To observe the changes in the wind speed, use it at different
places and different times of the day.
If you do not have a pencil with attached eraser you can use the tip of a
ball pen. The only condition is that the strips should rotate freely.
Remember that this anemometer will indicate only speed changes. It will not give you the actual wind speed.
hope it helps, mark as brainilist.
