<span>C.
Sample C would be best, because the percentage of the energy 
in an
incident wave that remains in a reflected wave from this material 
is the
smallest.
The coefficient of absorption is the percentage of incident sound 
that's absorbed.  So the highest coefficient of absorption results in 
the smallest </span><span>percentage of the energy in an
incident wave that remains.
That's what you want. </span>
        
             
        
        
        
K = C + 273, so 27°C = 27+273 = 300 K
1 dg = 100 mg, so 20 dg = 20×100 = 2,000 mg
        
             
        
        
        
The accurate about the planet’s climate system is the wind 
because heating near the equator blows the wind to drive the convection cells in the atmosphere, and the friction created by the rotation of the spherical planet in the atmosphere causes the wind to appear to bend left or right across the surface of the planet. ..
The climate system is a highly complex global system consisting of five major components: the atmosphere, the ocean, the cryosphere (cryosphere), the land surface, the biosphere, and the interactions between them.
Solar energy drives the climate by heating the surface of the earth unevenly. Ice also reflects incoming sunlight, further cooling the poles. Temperature differences move the ocean and atmosphere as they work together to disperse heat throughout the globe.
Learn more about the planet’s climate system here:brainly.com/question/15351986
#SPJ4
 
        
             
        
        
        
Answer:
False
Explanation:
I learned it the hard way trust me T^T
 
        
             
        
        
        
The angle of inclination is calculated using sin
function,
sin θ = 5 m / 20 m = 0.25 
θ = 14.4775° 
 
<span>The net force exerted is then calculated:
F net = m g sin θ = 20 * 9.8 * 0.25 </span>
F net = 49N 
<span>Work is product of net force and distance:
W = F net * d = 49 * 20 </span>
<span>Work = 980 J </span>