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Quick question.

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Well last year our (OCR AS) practical was on strain gauges and we had to teach ourselves the Wheatstone bridge.

Anyway, this is a planning exercise. You're not actually going to do it - however you will have to do some preliminary work to prove that it's feasible.
endeavour
Well last year our (OCR AS) practical was on strain gauges and we had to teach ourselves the Wheatstone bridge.

Anyway, this is a planning exercise. You're not actually going to do it - however you will have to do some preliminary work to prove that it's feasible.

so for anemometer.
I would just say, use a cup anemometer. Place in front of wind source. Speed of rotation of cups indicates the speed of the wind. I will use this type of anemometer with a digital display. Wind speed in chosen units is displayed.
I was going to do the paper cup method but I researched on this method and a lot of sources say that this method is very inaccurate due to friction and drag.
My teacher told me that by doing the method in the form of a flow diagram, you don't have to include the text in the word count, this also applies to text in tables, labels, graphs etc.
Is he correct?
Reply 24
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Douglas
9
Widowmaker
Surely the fact that the experiment is being done indoors.
The sheet says that the board is initially in still air.
Wouldn't this mean that if the anemometer was able to rotate freely and the system (e.g. the cups) were of low weight. Wouldn't the cup painted red for example travel at approximately the same speed as the wind?
It is only AS, surely they don't expect us to write really complicated stuff here?

I've been on a lot of websites and they have calculated wind speed in metres per second for example from rpm.

Here's a simple experiment...
http://is2.dal.ca/~malkhali/beaufort.htm
Douglas
Here's a simple experiment...
http://is2.dal.ca/~malkhali/beaufort.htm

I think i'll use something like this.

http://www.lawsonwatch.com/maxdicdigana.html
Reply 26
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Douglas
9
Widowmaker
I think i'll use something like this.

http://www.lawsonwatch.com/maxdicdigana.html

Do you have $295.00 to spare??
Douglas
Do you have $295.00 to spare??

it's only a plan. I'm not doing the experiment. Teacher said that they would be able to buy it.

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