At what temperature (in .C) does still air cause the same chill factor as 5C air moving at 15 m/s? (Use any necessary data found in this table.) X Additional Materials Reading 3. [-/2 Points] DETAILS OSCOLPHYS2016 14.7.P.058. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) Calculate the rate of heat transfer (in W) by radiation from a car radiator at 105C into a 45.0C environment, If the radiator has an emissivity of 0.750 and a 1.25 m surface area. (b) Is this a significant fraction of the heat transfer by an automobile engine? To answer this, assume a horsepower of 200 hp (150 KW) and the efficiency of automobile engines as 25%. O No, this is between 1% and 5% of the heat transfer by an automobile engine. O No, this is less than 1% of the heat transfer by an automobile engine. O Yes, this is between 50% and 100% of the heat transfer by an automobile engine. O Yes, this is between 5% and 50% of the heat transfer by an automobile engine. Additional Materials Reading