Is it reasonable to expect superconductivity in a "glass," a material with almost no crystalline structure? Why or why not, if that's the case?

what would happen if we replaced the PVC rod with a semiconductor material? What mechanisms could we employ to inject energy into the bound charges in the semiconductor to force it to act like more of a conductor?

A yoyo of radius R and mass M is released from rest with the string vertical and its top end fixed up a support as shown below. How fast is the center of mass of the yoyo moving when it has fallen a distance of 47 cm. Ignore the mass of the string and express your answer if m/s

I need the answer as soon as possible