Answer:
This represents radiation in ultra-violet region . 
Explanation:
Energy of the orbit where n = 3 is given as follows 

 = -1.511 eV
 = -1.511 eV 
Energy of the orbit where n = 1 is given as follows 

 = 13.6 eV
 = 13.6 eV
Difference of [tex]E_3 and [tex]E_1 = - 1.511+ 13.6 
= 12.089 eV.
The wavelength of light having this energy in nm is given by the expression as follows 
Wavelength in nm = 1244 / energy in eV
= 1244 / 12.089
= 102.90 nm
This represents radiation in ultra-violet region . 
 
        
             
        
        
        
Answer:
Explanation:
Unknown fork frequency is either 
335 + 5.3 = 340.3 Hz
or
335 - 5.3 = 329.7 Hz
After we modify the known fork, the unknown fork frequency equation becomes either 
(335 - x) + 8 = 340.3
(335 - x)  = 332.3
x = 2.7 Hz
or
(335 - x) + 8 = 329.7
(335 - x) = 321.7
x = 13.3 Hz
IF the unknown fork frequency was 340.3 Hz,
THEN the 335 Hz fork was detuned to 335 - 2.7 = 332.3 Hz
IF the unknown fork frequency was 329.7 Hz, 
THEN the 335 Hz fork was detuned to 335 - 13.3 = 321.7 Hz
 
        
             
        
        
        
The sun has orbited along time so when they ask theses questions I give you the right answer I think lol
        
             
        
        
        
However instead of crests and troughs, longitudinal waves have compressions and rarefactions. Compression. A compression is a region in a longitudinal wave where the particles are closest together. Rarefaction. A rarefaction is a region in a longitudinal wave where the particles are furthest apart.
        
             
        
        
        
The deceleration experienced by the gymnast is the 9 times of the acceleration due to gravity.
Now from Newton`s  first law, the net force on gymnast,

Here, W is the weight of the gymnast and a is the acceleration experienced by the gymnast ( acceleration due to gravity)
 acceleration due to gravity)  
Therefore,
 OR
 OR 
Given  and
 and
Substituting these values in above formula and calculate the force exerted by the gymnast,  
 
