Assume the carrying capacity of the earth is 11 billion. Use the 1960s peak annual growth rate of 2.1 % and population of 3 billion to predict the base growth rate and current growth rate with a logistic model. Assume a current population of 6.8 billion. How does the predicted growth rate compare to the actual growth rate of about 1.2 % per year?

Here two spring balance are connected end to end

So we can say that here it is series combination

So force on each spring will be same as spring is to be considered as ideal spring

So here each spring is balanced with same force

For force balance we can say that force of gravity is counter balanced by spring force

so here since each spring is balanced by same force

so reading of each spring will be same and it is equal to 20 N

reading of spring balance 1 = 20 N

reading of spring balance 2 = 20 N