Answer 
The velocity of the bird is 2 m /sec .
Explanation:
The formula for kinetic energy is given by.

Where m is mass ,  v is the velocity .
As given
A 4.0 kg bird has 8.0 joules of kinetic energy .
m = 4.0 kg 
K.E =  8.0 joules 
Putting in the formula





Thus 
v = 2 m/sec
Therefore the velocity of the bird is 2 m /sec .
 
        
             
        
        
        
Answer:
AM broadcasts occur on North American airwaves in the medium wave frequency range of 525 to 1705 kHz (known as the “standard broadcast band”). The band was expanded in the 1990s by adding nine channels from 1605 to 1705 kHz.
 
        
             
        
        
        
Answer:
19 pizzas
Explanation:
1 pizza = 3 boys
=> 56 ÷ 3 = 18.666666666666.. or about 19 pizzas
 
        
                    
             
        
        
        
A dishwasher and a dryer im not sure if that is right but that’s what I would put
        
                    
             
        
        
        
Answer:
That the polar air has has more pressure than the air at the equator.
Explanation: