The interview process began with a brief, non-technical phone screening. This was followed by a technical assessment test, a technical phone interview, and finally, an on-site interview.

The on-site interview involved several components:

• Presenting a previous project, followed by a Q&A session.
• Studying a field study case for a short period and then presenting the results and analysis.
• A tour of our Hawthorne facility.
• Completing a short written exam with technical engineering questions.
• Participating in a series of one-on-one interviews with different team members.

The on-site interview was scheduled for four to five hours but ultimately lasted about seven hours. Overall, it was a very positive and educational experience.

You have an inflated balloon held shut. Then, suddenly let go of the opening.

Plot the diameter of the balloon versus time and explain your assumptions.