Answer:
1.45
2.61
3.33
4.108
5.98
6.82
7.52
8.142
9.36
10.64
Step-by-step explanation:
Use rule that a straight line is 180 and a right angle is 90
 
        
             
        
        
        
Answer:
The answer is 6 units! Have a nice day! :D
Step-by-step explanation:
 
        
                    
             
        
        
        
Step-by-step explanation:
 first you have to use the formula for circle is 2πr 
 22
 π= ---- 
 7 
and r stands for radius
 
        
             
        
        
        
Answer:
12 
Step-by-step explanation:
4hoursx3 temp increase=12
 
        
             
        
        
        
The sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec
<h3>Calculating wavelength </h3>
From the question, we are to determine how many times longer is the first sound wave compared to the second sound water 
Using the formula, 
v = fλ 
∴ λ = v/f
Where v is the velocity 
f is the frequency 
and λ is the wavelength 
For the first wave 
f = 20 waves/sec 
Then, 
λ₁ = v/20 
For the second wave 
f = 16,000 waves/sec 
λ₂ = v/16000
Then, 
The factor by which the first sound wave is longer than the second sound wave is 
λ₁/ λ₂ = (v/20) ÷( v/16000)
= (v/20) × 16000/v)
= 16000/20
= 800
Hence, the sound wave with a <u>frequency of 20</u> waves/sec is 800 longer than the wavelength of a sound wave with a <u>frequency of 16,000</u> waves/sec
Learn more on Calculating wavelength here: brainly.com/question/16396485 
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