Answer:
Explanation:
A tension or current expressed in cosine form and with a positive sign can be converted directly into a phasor. This is done by indicating the tension and the offset angle:
So:
You can sum the phasors simply using a calculator, however, let's do it manually:
Let's find the rectangular form of each phasor using the next formulas:
For
So:
For
So:
Hence:
Finally:
Answer:
1. Oil
2. Grease
3. Penetrating Lubricants
4. Dry Lubricants
Answer:
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.