What is the net power that a person loses through radiation if ...

[cartlidgeashley]

What is the net power that a person loses through radiation if her surface area is 1.20 m2, if her emissivity is 0.895, if her skin temperature is 300 K,
 
  and if she is in a room that is at a temperature of 17C? The Stefan-Boltzmann constant is 5.670  10-8 W/m2  K4.
  A) 60.3 W
  B) 62.6 W
  C) 65.7 W
  D) 68.4 W
  E) 64.8 W

Question 2

In a double-slit experiment, the slit separation is 2.0 mm, and two wavelengths, 750 nm and 900 nm, illuminate the slits simultaneously. A screen is placed 2.0 m from the slits.
 
  At what distance from the central maximum on the screen will a bright fringe from one pattern first coincide with a bright fringe from the other? A) 1.5 mm
  B) 3.0 mm
  C) 4.5 mm
  D) 6.0 mm
  E) 9.0 mm

[tanna.moeller]

Answer to Question 1

B

Answer to Question 2

C

[cartlidgeashley]

Excellent

[samiel-sayed]

Thanks for the timely response, appreciate it