What happens when a windmill's materials/design specifications are pushed beyond their limits

This is what happens when lightning strikes a windmill or the brakes fail?  At excessive speeds, the generator and blades can't handle the stress and kaboom!

Which of the following mechanical properties would you think are important for a windmill?

• hardness
• elasticity
• resilience
• ductility
• malleability
• stiffness
• resists corrosion
• conducts electricity
• conducts heat (thermal energy)

The Mother of All Science Resources

Hi All,

The Montreal and Laval School Boards got together and made this mega awesome resource.  Considering someone from inside these boards probably wrote the exam, you might consider taking a look.  The doc is in google docs in the exam study folder or follow the link below.

https://docs.google.com/file/d/0B6GI0t4hbq6bU05oZUs5U1dYN0E/edit?usp=sharing