Questions

Flows out of Newton's first law of motion.

The power source such as a Battery of an IED creates an electrical charge.

What are IED's ::

An Improvised Explosive Device (IED) is a bomb constructed and deployed in ways other than in conventional military action. It may be constructed of conventional military explosives, such as an artillery shell, attached to a detonating mechanism. IEDs are commonly used as roadside bombs.

The monomeric unit of orlon polymer is Acrylonitrile. Orlon is also known as Polyacrylonitrile (PAN). 

The interviewer asks the queries to interviewee to know the interest of an individual. This is because if an individual has more interest in a particular part, then there will be more chances of getting a job in an area of interest and specialization. The employer wants to know you're serious about pursuing a career in fashion. Companies spend a lot of time and money training employees, so before they make that investment, they want to make sure you're not just applying for a job in the industry on a whim.

If he was unable to make his shift, I would find a replacement, and stay until the replacement came in.