thermal lab

ME 495 – Homework 10

Summer 2019

Submission Deadline: 23rd July (Tuesday) by 5 PM

Note: Write your name at the top right-hand corner of the first page of your homework.

Problem 1:

Problem 2:

Problem 3:

Problem 4: For a smooth pipe, the friction factor (f) is:

f = (0.79 ln Re – 1.64)-2

What is the uncertainty of f ? Let ρ = 0.95 ± 0.1 kg/m3, U = 1 ± 10% m/s, D = 0.5 ± 0.025 m and

μ= 184.6 x 10-7 ± 5% N.s/m2

Problem 5:

Use Voltage as 100 V for all the cases. Part 1 was solved in class and you do not need to do this.

Only solve for Part 2 and discuss how it’s different from Part 1. Use the method discussed in class.