23. If 10780 J of heat energy is transferred though the window every 1 point second, how much energy will be transferred in a 30 day month? a. 1.36 x 10 9 J b. 2.799 x 10 9 J C. 4.36 x 109 J O d. None of the choices 24. The R-value for a certain building material that is 2.4 mm thick is 1.5. 1 point What is the R-value if the thickness is increased to 4.8 mm. a. 2.4 b. 2.7 O C. 3 O d. None of the choices25. A sphere (e=0.42) of radius 25 cm is at 270C. It is placed in a room with 1 point a temperature of 20C. what is the rate of heat energy leaving the sphere? O a. 245.36 W b. 151.4 W C. 121.65 W O d. None of the choices