Experiment G1

Question 1

c) Each set of points should fall on a straight line passing through the origin.
▬▬► Explain why this is so.

Answer 1

Question 2

d) Draw straight lines passing through the origin and the lowest flow rate point for each tube.
▬▬► Explain why the line for the largest tube has the largest slope.

Answer 2

Question 3

(i) What do you conclude from parts (a,b,c and d) of your experiment?

Answer 3

Volume flow rate is directly proportional to pressure gradient.

Question 4

(iii) If the power of r predicted by you in part (g and h) differs significantly from 4, can you suggest why?

Answer 4

Experimental error, which is a direct result of apparatus not being used accurately enough.

Question 5

(iv) Why is the graph in part (g) not a suitable one to use to determine η?

Answer 5

Perhaps the values of △h used were not small enough.