Well my thinking is that the lighter the slower the water evaporates or the darker the faster becuase dark colors absorb light and allows a lot of heat to be generated or not at all.
        
             
        
        
        
Answer:0.1759 v
Explanation:
Intensity of wave at receiver end is 
I=
I=
I=
Amplitude of electric field at receiver end

Amplitude of induced emf
=
=
=
 
        
             
        
        
        
Celina should perform the following method to get pure water:
Boil the water in a pan, as the water boils it changes into gas (water vapours) these vapours should be cooled down through the process of condensation which changes gas into liquid form, Through this process germs would be killed due to high temperature and the salt will remain in the pan as salt has higher boiling point than water, 
 
        
                    
             
        
        
        
1. The velocity decreases, and the kinetic energy decreases.
2. An increase in temperature difference between the inside and outside of the building.
3. The total kinetic energy remains the same.
4. 76,761 J
5. The energy loss must increase.
 
        
             
        
        
        
Answer:
book speed is 3.99 m/s
Explanation:
given data 
mass m = 490 g = 0.490 kg
compressing x = 7.10 cm = 0.0710 m
spring constant k = 1550 N/m
to find out
book speed 
solution
we know energy is conserve so 
we can say 
loss in spring energy is equal to gain in kinetic energy 
so
    ..................1
put here value
 
v = 3.99 m/s
so book speed is 3.99 m/s