Answer:
6g/cm³
Explanation:
Density is the mass per unit volume of any substance. To solve this problem: 
     
    Density  =  
  
  Since mass = 600g 
Let us find the volume; 
     Volume  = length x width x height 
    Volume  = 25cm x 2cm x 2cm  = 100cm³  
 Therefore; 
          Density  =  = 6g/cm³
    = 6g/cm³
 
        
             
        
        
        
Answer:
Electrical Energy 
Explanation:
An electric generator is a device that changes kinetic energy to electrical energy through electromagnetic induction. Electromagnetic induction is the process of generating electric current with a magnetic field. ... Because the coil is rotating in a magnetic field, electric current is generated in the wire.
 
        
             
        
        
        
Answer:
The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength. Speed shows how long it takes for wavelengths to travel.