Final answer:
A 10-ton refrigeration unit has a capacity of 12,000 btu/minute, which is derived from the standard definition of one ton of refrigeration.
Step-by-step explanation:
The capacity of a 10-ton refrigeration unit is 12,000 btu/minute. This comes from the definition of refrigeration tonnage, where one ton of refrigeration is equal to the absorption of heat at a rate of 12,000 British Thermal Units (BTUs) per hour. Since there are 60 minutes in an hour, this translates directly into 12,000 BTUs per minute.