Answer:
281.25 J
Explanation:
We are told that the two objects with masses m and 3m.
Also that energy stored in the spring is 375 joules. 
Now, initially the centre of mass of the system took place at rest, it means v1 = v and v2 = v/3
Thus, from principle of conservation of energy, we have;
½mv² + ½(3m)(v/3)² = 375J
(m + 3m/9)½v² = 375
(4/3)m × ½v² = 375
Multiply both sides by ¾ to get;
½mv² = 375 × ¾
½mv² = 281.25 J
Therefore, energy of lighter body is 281.25 J
 
        
             
        
        
        
True. No matter can be created nor destroyed in pretty much every aspect of life, especially chemical reactions.
        
             
        
        
        
Answer:
Explanation:
The equation for this is
 where f is the frequency, v is the velocity, and lambda is the wavelength. Filling in:
 where f is the frequency, v is the velocity, and lambda is the wavelength. Filling in:
 and
 and
 which means that
 which means that
the wavelength is 1.37 m, rounded to the correct number of significant digits.
 
        
             
        
        
        
In both magnitude and direction since acceleration is a vector quantity
        
                    
             
        
        
        
Answer:
D) directly, inversely
Explanation:
The energy of a photon of light is directly proportional to its frequency and inversely proportional to its wavelength. 
Frequency is the number of waves that passes through a point per unit of time. 
Wavelength is the is the distance between successive crests or troughs on a wave. 
  Mathematically, frequency is related to wavelength and velocity using;
              Energy   =  h x f 
                       where h is the Planck's constant
                                   f is the frequency
           
                    Since c  = f ∧
where f is the frequency of the wave
            ∧ is the wavelength of the wave
            c is the speed of light
So; 
                  f  = c/∧
   Therefore; 
                 E  = 
From the equation, we see an inverse relationship between E and wavelength and a direct one with frequency.