Electromagnetic and mechanical waves have different characteristics that make them advantageous for certain applications. Select the reasons that mechanical waves, such as ultrasound, are used for soft tissue imaging and to identify fractures in metals.
I) mechanical waves are less likely to damage materials than most electromagnetic waves.
II) mechanical waves have more energy than electromagnetic waves
III) mechanical waves can transmit results more rapidly than electromagnetic waves
IV) mechanical waves generate vibrations that are sensitive to changes in temperature and density
A) I and IV
B) I and III
C) II and IV
D) II and III
PLEASE HELP
electromagnetic waves, Xray for example, can damage soft tissue so ultrasound might often be a better choice. That favors I
If you are looking for an internal crack in a steel beam, an electromagnetic wave will not likely help much. However again a sound or vibration wave might reflect and refract at the boundary and show that something is wrong. IV
The correct answer is A) I and IV.
I) Mechanical waves, such as ultrasound, are less likely to damage materials than most electromagnetic waves. This is because mechanical waves typically have lower energy and do not ionize molecules like some electromagnetic waves do.
IV) Mechanical waves generate vibrations that are sensitive to changes in temperature and density. This property makes them well-suited for soft tissue imaging and identifying fractures in metals, as changes in temperature and density can be indicators of structural abnormalities.
To determine the reasons why mechanical waves, such as ultrasound, are used for soft tissue imaging and to identify fractures in metals, let's analyze each option:
I) Mechanical waves are less likely to damage materials than most electromagnetic waves.
This is a valid reason for using mechanical waves for soft tissue imaging and identifying fractures in metals. Mechanical waves, like ultrasound, are less likely to cause damage compared to certain types of electromagnetic waves, such as X-rays. This is because mechanical waves have lower energy and are less ionizing.
II) Mechanical waves have more energy than electromagnetic waves.
This statement is incorrect. In general, electromagnetic waves have more energy than mechanical waves. Therefore, this reason is not applicable.
III) Mechanical waves can transmit results more rapidly than electromagnetic waves.
This statement is also incorrect. Electromagnetic waves, such as radio waves or light waves, can transmit information at the speed of light, which is incredibly fast. Mechanical waves, on the other hand, travel at a slower speed. Therefore, this reason is not applicable.
IV) Mechanical waves generate vibrations that are sensitive to changes in temperature and density.
This is another valid reason for using mechanical waves for soft tissue imaging and identifying fractures in metals. Mechanical waves, like ultrasound, can interact with materials and generate vibrations that are sensitive to changes in temperature and density. This enables them to provide valuable information about the internal structure of soft tissues or identify fractures in metals.
Considering the explanations above, the correct answer is A) I and IV.