What is the main topic of the text above? a) The detection of defects in materials using ultrasonic tests. b) The use of ultrasonic waves in the ...
What is the main topic of the text above?
a) The detection of defects in materials using ultrasonic tests.
b) The use of ultrasonic waves in the detection of defects in materials.
c) The physical principles of waves and thermodynamics.
d) The history of physics and its main contributors.
a) The detection of defects in materials using ultrasonic tests.
b) The use of ultrasonic waves in the detection of defects in materials.
c) The physical principles of waves and thermodynamics.
d) The history of physics and its main contributors.
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Ed 
A resposta correta é a alternativa "b) O uso de ondas ultrassônicas na detecção de defeitos em materiais".
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