Answer:Visible light is a small part of the electromagnetic spectrum. The spectrum covers everything from gamma rays, x-rays, visible light, infrared, microwave and radio waves. Each part of the spectrum, including the different colors of visible light, have different wavelengths (the space between each wave).
Explanation:
 
        
             
        
        
        
Answer:
c.   V = k Q1 * Q2 / R1      potential energy of Q1 and Q2 separated by R
V2 / V1 = (R1 / R2) = 1/4
V2 = V1 / 4
 
        
             
        
        
        
Answer:
Missing numbers are 3,11,13, 15,17,19, 23,27,29 and wrong are 6,68
 
        
             
        
        
        
Answer:
A. potential energy is 258720 Joule 
Explanation:
A.Gravitational potential energy is: PE = m × g × h 
velocity =  15.33 m/s when the car reaches the bottom of the hill. 
where, m = mass
             g = acceleration due to gravity
             h = height from the bottom of hill. 
The potential energy is : m×g×h
                                      =(2200×9.8×12) 
                                      =258720 Joule
B. at the bottom of the hill, the potential energy is converted into kinetic energy so PE at top = KE at bottom 
                     kinetic energy=  (
( )
)
where v = velocity
           m= mass 
therefore,               v=
                          or,  v=
                          or,   v=15.33 m/s
 
        
             
        
        
        
Answer:
Thermal energy always flows from the warmer object to the colder object. This causes your hand to get cold, while the ice absorbs your heat and melts.