How well does the theoretical model predict the measured force for the symmetric and asymmetric impact surfaces?

Explanation:

1) First step would be determining the measured force through your experiment for the Reaction force of the both the surfaces on the jet of fluid stream. The value would be R_actual.

2) Second step is to compute the Reaction force by the theoretical model which takes an assumption of no kinetic energy loss from a jet of fluid stream impinging on to the surfaces i.e the velocity before and after impact is the same. This value would be R_theoratical.

3) Step Three would be to compare the actual and theoretical values of Reaction forces exerted by the surfaces by the following formula:

         % Difference = [ ( R_actual - R_theoratical ) / R_actual ] * 100

4) The standard followed is that a theoretical model must predicts within 10% uncertainty about the actual value obtained from experiment.

5) If the difference is greater than 10% it means that the assumption of no Kinetic Energy Losses was not feasible and should be included in the model for accuracy.

x+2 because it just doubles hon so the pattern can actually tell you the expression.

so for example,

if x=2 then 2+2 is 4

if x=4 then 4+4 is 8

and so on and so forth.

i really hope that this makes sense and you out in a way hon: )