Tristan is an engineer working on a design for a new roller coaster. he wants the car to shoot out of the station very fast but needs a superconductor to be able to accomplish this. he is looking at different materials to use on the tracks of the roller coaster. what is necessary for his material to function as a superconductor? check all that apply.
a. t < tc
b. a solid metal conductivity
c. a very cold temperature
d. a low boiling point no resistance

A and C

Explanation:

Some materials can function as superconductor when their Temperature lowers under its critic temperature Tc, which is a really low temperature, close to 0K. This is because the low temperature reduces the internal movements of the particles of the material, this means that electrons will be able to move easily. There is no need for the superconductor to be a metal.

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

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