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Artifacts may appear in ultrasound images when reverberation…

Artifacts may appear in ultrasound images when reverberations occur.

Published April 23, 2025
Categorized as Uncategorized

A wave with a frequency between about 20 and 20,000 Hz is a…

A wave with a frequency between about 20 and 20,000 Hz is a sound wave that is audible to the human ear.

Published April 23, 2025
Categorized as Uncategorized

An ultrasonic beam propagates from medium 1 into medium 2. I…

An ultrasonic beam propagates from medium 1 into medium 2. If the incident angle is smaller than the refraction angle, the sound velocity in medium 1 is higher than that in medium 2.

Published April 23, 2025
Categorized as Uncategorized

When an ultrasound beam propagates from medium 1 into medium…

When an ultrasound beam propagates from medium 1 into medium 2, it has 50% reflection. Assume medium 1 has an acoustic impedance of 1 MRayl. The impedance of medium 2 is:

Published April 23, 2025
Categorized as Uncategorized

The main reason of using ultrasound gel between a scanner an…

The main reason of using ultrasound gel between a scanner and the skin is to allow the scanner to move smoothly on the skin.

Published April 23, 2025
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Who usually elects the Board of Directors for a corporation?…

Who usually elects the Board of Directors for a corporation? 

Published April 23, 2025
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When a corporation sells stock to the public it is first don…

When a corporation sells stock to the public it is first done through what mechanism?

Published April 23, 2025
Categorized as Uncategorized

Which of the following foods is a good source of vitamin D f…

Which of the following foods is a good source of vitamin D for a school-age child?

Published April 22, 2025
Categorized as Uncategorized

If adults of legal drinking age choose to consume alcohol, t…

If adults of legal drinking age choose to consume alcohol, the Dietary Guidelines for Americans recommend drinking in moderation, which is defined as

Published April 22, 2025
Categorized as Uncategorized

Which of the following is a dietary strategy that may reduce…

Which of the following is a dietary strategy that may reduce the risk of lead poisoning among children?

Published April 22, 2025
Categorized as Uncategorized

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