Author Question: What is the net power that a person loses through radiation if her surface area is 1.20 m2, if her ... (Read 64 times)

cartlidgeashley · **on:** Jul 29, 2018

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