What does it equal to

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Which of these is a density dependent factor? a. epidemic b. earthquake c. drought d. hurricane

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)