Determine the average hydrogen concentration

Assignment Help Mechanical Engineering

Reference no: EM13942604

1. A 1-mm-thick square (100 mm X 100 mm) sheet of polymer is suspended from a precision scale in a chamber characterized by a temperature and relative humidity of T = 300 K and = 0, respectively. Sud- denly, at time t = 0, the chamber's relative humidity is raised to = 0.95. The measured mass of the sheet increases by 0.012 mg over 24 h and by 0.016 mg over 48 h. Determine the solubility and mass diffusivity of water vapor in the polymer. Preliminary experiments have indicated that the mass diffusivity is greater than 7 X 10^-13 m²/s.

2. A vitreous silica optical fiber of diameter 100 µm is used to send optical signals from a sensor placed deep inside a hydrogen chamber. The hydrogen is at a pres- sure of 20 bars.

(b) Determine the average hydrogen concentration and change in refractive index after 1 h and 10 h of operation in the hydrogen environment.

Reference no: EM13942604

Questions Cloud

Evidence that organisation gain a competitive advantage : Evidence that the organisation has a gain a competitive advantage from their marketing processes.

Demand in britain versus the united states : Increase in Housing Demand in Britain versus the United States. Suppose that in both Britain and the United States, the initial equilibrium price of housing is $200,000.

How do i identify a broadcast address and a subnet id : How do I identify a broadcast address and a subnet Id

Estimate the potential sales : Estimate the potential sales for this good/service. What factors did you consider in arriving at this estimate?

Determine the average hydrogen concentration : Determine the average hydrogen concentration and change in refractive index after 1 h and 10 h of operation in the hydrogen environment.

Intrusion of self-serving government regulators : The effect of the unnecessary intrusion of self-serving government regulators has been that dentists have been more and more controlled in their ability to make a decent living.

What is meant by the index of openness : What is meant by the index of openness? How is it calculated? Note: use the formula provided in topic 1 in your answer (same formula is in chapter 1 of the textbook). What does it tell us about an economy

Apply an understanding of organisational theory : This module is designed to provide students with the knowledge to develop and apply an understanding of organisational theory and global strategic human resource management theory and practice.

What are the productivity issues of the internet : What are the regulatory challenges of the Internet for management?

User Account

All Pages