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1 vote
An echocardiogram is a type of ultrasound test that measures sound waves as they bounce off the different parts of a person's heart. Which of these is the best model for how this test works? *

1 point
Counting the seconds between yelling and hearing an echo in a cave
Counting the minutes it takes a ship's anchor to reach the seafloor
Counting the seconds between seeing lightning and hearing thunder
Counting the minutes it takes a pot of water to come to a boil

1 Answer

1 vote

it’s Counting the seconds between yelling and hearing an echo in a cave I took the test the one above me is wrong

User Crazyzubr
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