When is heat exchanged during the refrigeration cycle?
during the initial condensation and final expansion of the refrigerant.
during the initial expansion and final condensation of the refrigerant.
during the pumping of hot air into the expansion valve.
during compression and heating of the refrigerant into a super hot vapor.

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."

because growing process had stoped after 4-5 year

answer; how far out of place which the object finished relative to the starting location;