Chemosynthetic bacteria or chemoautotropic bacteria is the new bacteria that was found by scientists in a hot water sulfur spring that uses sulfur as a source of energy instead of sunlight. This kind of bacteria can survive at a higher temperature than most organisms can.The bacteria uses the toxic hydrogen sulfide to produce organic materials by the process of chemosynthesis. These bacteria are a source of life for several other organisms that flourish in such conditions. The bacteria grows and forms a thick mat and this attracts several other organisms as the bacteria becomes a source of food. 
        
             
        
        
        
Visible light has more energy than microwaves but it has a smaller wavelength than microwave
        
             
        
        
        
Answer:

Explanation:
k = spring constant of the spring = 40 Nm⁻¹
A = amplitude of the simple harmonic motion = 4 cm = 0.04 m 
m = mass of the block attached to spring = 0.20 kg
w = angular frequency of the simple harmonic motion 
Angular frequency of the simple harmonic motion is given as 
 = Speed of the block as it pass the equilibrium point
 = Speed of the block as it pass the equilibrium point 
Speed of the block as it pass the equilibrium point is given as 

 
        
             
        
        
        
One quater as your moving away more!