Electromagnetic waves are used in everyday life. You are looking at your computer screen right now. The light that is coming off of the screen is visible light, a form of electromagnetic radiation. Electromagnetic waves are also used to send information. For example, AM or FM radios are radio waves that transfer sound information to your local radio.
        
                    
             
        
        
        
There are none on the list you included with your question.
        
                    
             
        
        
        
Answer:
0.25m/s
Explanation:
Given parameters
m₁  = 5kg 
v₁ = 1.0m/s 
m₂ = 15kg 
v₂ = 0m/s 
Unknown: 
velocity after collision = ? 
Solution: 
Momentum before collision and after collision will be the same. For inelastic collision; 
     m₁v₁ + m₂v₂  = v(m₁ + m₂)
Insert parameters and solve for v; 
    5 x 1  + 15 x 0 = v (5 + 15 )
           5  = 20v 
           v =  = 0.25m/s
   = 0.25m/s
 
        
             
        
        
        
Ideally, 576 J  because energy is conserved.
In the real world, a tiny tiny tiny tiny bit less than 576 J ,
because we live in a world with friction and air resistance.
        
             
        
        
        
Answer:
(a) 37.5 kg 
(b) 4
Explanation:
Force, F = 150 N 
kinetic friction coefficient = 0.15 
(a) acceleration, a = 2.53 m/s^2 
According to the newton's second law 
Net force = mass x acceleration 
F - friction force = m a 
150 - 0.15 x m g = m a 
150 = m (2.53 + 0.15 x 9.8) 
m = 37.5 kg 
(b) As the block moves with the constant speed so the applied force becomes the friction force. 
 