The process that keeps heat from being transferred between two substances is

The process that keeps heat from being transferred between two substances is insulation. E.g. a thermos that you keep coffee in, etc. Hope this helps! :)

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."