If both waves have the same wavelength, then the amplitude of 
their sum could be anything between 1 cm and 9 cm, depending 
on the phase angle between them.
If the waves have different wavelengths, then the resultant is a beat 
with an amplitude of 9 cm.
        
             
        
        
        
Combustion Engine Exhaust----Cars, trucks, jet airplanes and other combustion engine vehicles cause air pollution. The exhaust from these contains carbon monoxide, nitrous oxide and gaseous oxide. This type of air pollution creates smog
        
             
        
        
        
Answer: 390, right
explanation: The net force is just the sum of all of these forces acting on an object. ... This equation is the sum of n forces acting on an object. The magnitude of the net force acting on an object is equal to the mass of the object multiplied by the acceleration of the object, as shown in this formula.
 
        
             
        
        
        
Answer:

Explanation:
As per thermal radiation we know that rate is heat radiation is given as

here we know that
T = 34 degree C = 307 K

e = 0.557


now we have




 
        
             
        
        
        
Answer:
The answer is mutualism because they are both on the receiving and giving ends