The surface area of an unclothed person is 1.67 m2, and his skin temperature is 33.0°C. The person is located in a dark room with a temperature of 19.0°C, and the emissivity of the skin is e = 0.95. (Include the sign of the value in your answer.) (a) At what rate is energy radiated by the body?
W

(b) What is the significance of the sign of your answer?

Calculate the amount of heat produced when 18000 coulombs of charge is transferred in one hour through a potential difference of 50v

With i really need the correct answer!

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?