Question

question 1
what is one reason metals are used for roller coaster tracks?
they are brittle and break safely
they insulate and float
they conduct electricity and are strong
they are soft and bend easily
question 2
why are nonmetals helpful in ride seating and harnesses?

Explanation:

Step1: Analyze metal properties

Metals are known for being strong and good conductors of electricity. Roller - coaster tracks need to be strong to support the weight and speed of the coaster cars.

Step2: Evaluate each option

• Option 1: Metals are not brittle. Brittle materials break easily without much deformation, while metals are malleable and ductile (except for some exceptions like cast iron in a very specific sense, but not in general for roller - coaster tracks).
• Option 2: Metals do not float (density is generally higher than water) and are not insulators (they are conductors).
• Option 3: Metals conduct electricity (a physical property) and are strong (mechanical property), which are useful for roller - coaster tracks.
• Option 4: Metals are not soft in general (some like sodium are soft, but not the metals used for structural purposes like roller - coaster tracks. Metals used for tracks are alloys that are strong).

Answer:

They conduct electricity and are strong