A. Use the thin lens equation to determine the image distance from the lens. Is the correct answer because I have no idea why
        
             
        
        
        
Cosmic background radiation is electromagnetic radiation from the sky with no discernible source. The origin of this radiation depends on the region of the spectrum that is observed. 
        
                    
             
        
        
        
Answer:
(a) 62.69 nJ/m^3
(b) 1015.22 μJ/m^3
Explanation:
Electric field, E = 119 V/m 
Magnetic field, B = 5.050 x 10^-5 T 
(a) Energy density of electric field = 
            
 
           = 6.269 x 10^-8 J/m^3 = 62.69 nJ/m^3
(b) energy density of magnetic field = 
 
= 1.01522 x 10^-3 J/m^3 = 1015.22 μJ/m^3
 
        
             
        
        
        
8.16m is the required height, a 5kg stone need to be raised.
One sort of potential energy is gravitational potential energy, which is equal to the product of the object's mass (m), the gravitational acceleration (g), and the object's height (h) as measured in relation to the ground's surface (the body).
We obtain the formula by considering the work done in raising a mass m through a height h.
Work in elevating mass m through height h is equal to force times distance.
The force must be greater than the mass m's weight, hence F = mg.
Work done = mgh = gravitational potential energy
Energy =  Mass of the object × gravitational acceleration × height. 
Mass of the stone = 5kg
Equating ;
 ∴ 400 J = 5 kg × 9.8 m/s² × height 
    Height = 8.16 m
Therefore, 8.16m is the required height.
Learn more about energy here:
brainly.com/question/1242059
#SPJ1
 
        
             
        
        
        
A vegetable that people eat around the world it is green and it has a big seed on the inside of it and the outside is a A dark green layer with a bumpy texture