According to the passage, laminar flow was most likely to be observed under which of the following conditions?
A. Experiment 1, pipe diameter of 0.50 in, pipe angle of 45^◦.
B. Experiment 3, pipe diameter of 0.50 in, pipe angle of 15^◦.
C. Experiment 1, pipe diameter of 1.0 in, pipe angle of 30^◦.
D. Experiment 3, pipe diameter of 1.0 in, pipe angle of 60^◦.

Experiment 1
In Experiment 1, students began with a pipe of diameter 0.25 inches. The pipe was set first at a 15^◦ angle and tap water was released steadily from the tank into the pipe. The velocity of flow (V) was measured. The pipe was then set at a 30^◦ angle, a 45^◦ angle, and a 60^◦ angle, water was released steadily from the tank into the pipe, and the velocity of flow was measured. The process was then repeated for each diameter of pipe using the same amount of water each time. All data were recorded in Table 1. Temperature of the water was held constant at 20^◦C.

Experiment 3

In a third experiment, the tap water was replaced by Motor Oil B and the processes were repeated.

Transcribed Image Text:

D (in) 0.25 0.50 0.75 1.00 Angle of pipe 15⁰ 30° 45° 60° 15⁰ 30° 45⁰ 60° 15⁰ 30° 45° 60° 15⁰ 30° 45° Table 1 60° V(ft/s) 2.0 4.0 6.5 8.0 5.0 9.0 12.5 15.0 8.0 12.5 16.0 20.0 10.5 15.0 18.5 25.0