Answer:
Mass of the object or earth
 
        
             
        
        
        
Answer:
<em>380 kHz</em>
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Explanation:
The speed of sound is taken as 1500 m/s
The length of the fetus is 1.6 cm long
The condition is that the wavelength used must be at most 1/4 of the size of the object that is to be imaged.
For this 1.6 cm baby, the wavelength must not exceed 
λ =  of 1.6 cm =
 of 1.6 cm =  x 1.6 cm = 0.4 cm =
 x 1.6 cm = 0.4 cm = 
0.4 cm = 0.004 m   this is the wavelength of the required ultrasonic sound.
we know that 
v = λf
where v is the speed of a wave
λ is the wavelength of the wave
f is the frequency of the wave
f = v/λ 
substituting values, we have
f = 1500/0.004 = 375000 Hz
==> 375000/1000 = 375 kHz ≅ <em>380 kHz</em>
 
        
             
        
        
        
Roughly 1609 meters in one mile
 
        
             
        
        
        
Answer:
I literally just learned this last week and if I remember correctly it is Faraday's Law of Induction.
Explanation: Hope this helps also I hope you have/had an amazing day today<3