« on: 02/11/2018 01:36:08 »
How much sulphur can crustacean (yabbies, daphnias) take before mortality? Just need a general amount.
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The grassland is a primary producer - it captures the sunlight and uses the energy to drive photosynthesis and the production of plant biomass that the primary consumers eat. The food web is going to be very variable depending upon what lives on that land, and which bit of Australia you are considering....
Do you mean the rate of information transmission along the nerve and then the rate of processing through the visual cortex?
Define your decay constant L
Put your starting number into a cell, say B2. I always start with B2 to give me space for annotations.
In B3 write =B2*exp(-L)
Now use autofill to give values for B4.....BN where N is as large as you like.
You can calculate the half life t½ = ln2/L = 0.693/L and compare it with the graphical value.
The half-life or decay constant you use depends on how you want to reject the dice, usually either 1/6 per throw or 1/2 per throw. 1/6 will give you a smoother curve and a better fit between experiment and calculation - just like real life where measuring short halflives is much more difficult!.