Answer:
a) at T = 5800 k  
   band emission = 0.2261
at T = 2900 k
   band emission = 0.0442
b) daylight (d) = 0.50 μm
     Incandescent ( i ) =  1 μm
Explanation:
To Calculate the band emission fractions we will apply the Wien's displacement Law
The ban emission fraction in spectral range λ1 to λ2 at a blackbody temperature T can be expressed as 
F ( λ1 - λ2, T ) = F( 0 ----> λ2,T) - F( 0 ----> λ1,T ) 
<em>Values are gotten from the table named: blackbody radiati</em>on functions
<u>a) Calculate the band emission fractions for the visible region</u>
at T = 5800 k  
   band emission = 0.2261
at T = 2900 k
   band emission = 0.0442
attached below is a detailed solution to the problem
<u>b)calculate wavelength corresponding to the maximum spectral intensity</u> 
For daylight ( d ) = 2898 μm *k / 5800 k  = 0.50 μm
For Incandescent ( i ) = 2898 μm *k / 2900 k = 1 μm
 
        
             
        
        
        
Answer:
a) the power consumption of the LEDs is 0.25 watt
b) the LEDs drew 0.0555 Amp current
Explanation:
Given the data in the question;
Three AAA Batteries;
<---- 1000mAh [ + -] 1.5 v ------1000mAh [ + -] 1.5 v --------1000mAh [ + -] 1.5 v------
so V_total = 3 × 1.5 = 4.5V
a) the power consumption of the LEDs
I_battery = 1000 mAh / 18hrs    { for 18 hrs}
I_battery = 1/18 Amp    { delivery by battery}
so consumption by led = I × V_total
we substitute
⇒ 1/18 × 4.5
P = 0.25 watt
Therefore the power consumption of the LEDs is 0.25 watt
b) How much current do the LEDs draw
I_Draw = I_battery = 1/18 Amp = 0.0555 Amp 
Therefore the LEDs drew 0.0555 Amp current
 
        
             
        
        
        
Answer:
w = 10.437 kips
deflection at 1/4 span  20.83\E ft
at mid span = 1.23\E ft
shear stress  7.3629 psi
Explanation:
area of cross section = 18*76
length of span = 32 ft
moment = 334 kips-ft
we know that
moment = load *eccentricity
334 = w * 32
w = 10.437 kips
deflection at 1/4 span


          
          = 20.83\E ft
at mid span 



shear stress 

 
        
             
        
        
        
Answer:
Mass, in physics, quantitative measure of inertia, a fundamental property of all matter. 
Explanation:
Mass is the matter that makes up objects