What is the specific heat of a substance that requires 99,100 J of thermal energy to heat 3.47 kg of this substance from 15°C to 41°C?

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?