Which one of the following types of rock would weather the fastest
a. small piece of granite
b. large blocks of clay
c. small pieces of clay
d. large blocks of granite

In order for a high temperature boiler or steam engine to produce superheated water, or steam: the heat source must be greater than 100°c the water must be permitted to evaporate quickly the system must be sealed and become pressurized above atmospheric pressure the vapor pressure must be kept below 760 mm(hg)