Answer:
I think it's C!
Explanation:
Sound waves travel at 343 m/s through the air and faster through liquids and solids. The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. Your ear detects sound waves when vibrating air particles cause your eardrum to vibrate. The bigger the vibrations the louder the sound.
Hope this helps!
 
        
             
        
        
        
Answer:
Explanation:
Given

Frictional Force is balanced by force due to car acceleration 
Frictional force 




 
        
             
        
        
        
Answer:
The right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²
Explanation:
Thickness of the wall is  L=  20cm = 0.2m
Thermal conductivity of the wall is  K = 2.79 W/m·K
Temperature at the left side surface is T₁ =  50°C
Temperature of the air is T = 22°C
Convection heat transfer coefficient is  h = 15 W/m2·K
Heat conduction process through wall is equal to the heat convection process so

Expression for the heat conduction process is

Expression for the heat convection process is

Substitute the expressions of conduction and convection in equation above


Substitute the values in above equation

Now heat flux through the wall can be calculated as

Thus, the right wall surface temperature and heat flux through the wall is 35.5°C and 202.3W/m²